Fifteen acts will perform at the first semi-final of Eurovision 2024 - but only 10 will qualify.

The 1957 Eurovision Song Contest was hosted by the Hessischer Rundfunk on behalf of Deutsches Fernsehen ARD. Austria, Denmark and the United Kingdom entered the contest for the first time, joining the other seven participating countries from the previous year. Despite the fact that an increasing number of Europeans had access to television, the contest was still mainly a radio programme at this time. In a change to the contest the year before, duos were allowed into the competition. Danish duo Birthe Wilke and Gustav Winckler shocked the audience with their passionate on-screen kiss, the longest in the history of the contest. Germany's entry, performed by Margot Hielscher featured a telephone during the performance, the first gimmick to appear at the Eurovision Song Contest.

The audience will have the opportunity to participate in the world's biggest sing along, together with three iconic Eurovision queens – Helena Paparizou, Sertab Erener and Charlotte Perrelli.

The 2024 Eurovision Song Contest was held in Malmö, Sweden, following Loreen's historic 2023 win. It marked the third time the city had hosted the event. 37 countries participated under the slogan "United By Music," which was adopted as the permanent slogan for all future contests. The show, hosted by Malin Åkerman and Petra Mede, featured a unique 360-degree, cross-shaped stage placed in the middle of the audience. A key change saw the pre-qualified 'Big 5' and host Sweden perform their songs in full during the Semi-Finals for the first time. After 25 nations competed in the Grand Final, Switzerland's Nemo was crowned the winner with the song "The Code," securing the country's third victory. Croatia finished second after winning the public televote, with Ukraine, France, and Israel completing the top five.

Inspired by the Italian Sanremo Festival, the idea to organise a pan-European musicial competition was born at a meeting of the European Broadcasting Union in Monaco in 1955. It was decided that the first ever Eurovision Song Contest would be hosted the following year in the Swiss resort of Lugano. The 1956 Eurovision Song Contest was primarily a radio show, although some cameras were taping the contest for the few Europeans who had a television set at that time. Lohengrin Filipello hosted the programme, which lasted 1 hour and 40 minutes. The seven participating countries each submitted two entries. The songs of the contest were not to exceed three and a half minutes, and the performers were accompanied by an orchestra of 24 musicians, led by Fernando Paggi.

The Dutch entry Net Als Toen by Corry Brokken had brought the first victory to the Netherlands in Frankfurt am Main the previous year and Dutch TV was the proud host in 1958. It was the first time that the winning country from the previous year had hosted the contest. Despite ending third, the Italian entry Nel Blu Dipinto Di Blu, better known under the title Volare, performed by Domenico Modugno, became a worldwide hit and to date. It is one of the most successful songs in the history of the Eurovision Song Contest. Domenico even managed to reach the No.1 spot in the US-American Billboard Charts with his song and was also awarded three Grammies.

The Eurovision Song Contest of 1959 welcomed the small principality of Monaco. Moreover, the United Kingdom re-entered the contest after one year of absence, and Luxembourg decided not to participate. A new rule was introduced to this fourth Eurovision Song Contest; musical experts were no longer allowed in the national juries, but other than that, the same voting system as in 1957 and 1958 was used.

The capital of the United Kingdom, London, provided the setting for the fifth Eurovision Song Contest. This was despite the fact that the Netherlands actually won the Eurovision Song Contest in Cannes the year before with Een Beetje, performed by Teddy Scholten. Following the victory the Dutch national broadcaster did not want to host the contest again so the honour went to the UK which had finished second the year before.

Just like in 1959, the Palais des Festivals was the venue of this year's contest. The presenter of the show was Jacqueline Joubert, who already did this task in 1959. The stage used for the show was much bigger than in previous years, and it was magnificently decorated with flowers. The number of participants of this year’s song contest rose to 16 as Spain, Yugoslavia and Finland all made their respective debuts. For the first time, the contest took place on a Saturday night which would come to be the contest's home.

After the victory in Cannes in 1961, Luxembourg was the host of the seventh Eurovision Song Contest. The stage was decorated with twinkling stars, but unfortunately they could not be seen for parts of the evening because there were some problems with the lights in the big auditorium of the Villa Louvigny. The number of participants of this year's contest remained stable at 16 with no new countries entering. However, there was a change in the voting system: the national juries - which still consisted of 10 people - had to attribute 3, 2 and 1 points to their three favourite songs.

The UK hosted the song contest after France declined, having recently hosted twice (1959 & 1961). The competition featured international stars like Esther Ofarim (Switzerland), Nana Mouskouri (Luxembourg), and Francoise Hardy (Monaco). Host broadcaster BBC used an innovative approach: songs were performed in one studio while the audience watched from another. Each performance had unique, rapidly changed staging, sparking untrue rumours that the songs were pre-recorded. A voting controversy erupted when the Norwegian jury spokesperson, caught unprepared by presenter Katie Boyle, gave a rushed, incorrect set of points. Following the rules, Boyle returned to the Norwegian jury after all other countries had voted. Their corrected final results were decisively different from the interim ones, handing victory to their Nordic neighbour, Denmark, in a close race with Switzerland.

The 1964 Eurovision Song Contest took place in the famous Tivoli Concert Hall in Copenhagen. The event became highly politicised with demands that right-wing dictatorships in Spain and Portugal should be excluded from the contest. There was even some trouble during the contest as just before the Belgian entry, a man entered the stage holding a banner saying "Boycott Franco and Salazar". He was quickly removed from the stage. As in the three previous contests, 16 countries participated in the competition. Portugal made its debut whilst Sweden chose not to enter. Germany, Portugal and Switzerland each scored zero points for the first time. In the case of Portugal, it was the first time in the history of the contest that a newcomer did not receive any points at all.

Italy and its national broadcaster RAI hosted this year's contest for the first time. 18 countries took part, at that point, the number of participants ever. After a year of absence, Sweden returned to the competition and Ireland debuted. Belgium, Germany, Finland and Spain all scored nul points while Luxembourg won for the second time with the highly controversial Poupée De Cire, Poupée De Son sung by teenager France Gall. The song went on to become a massive hit in almost all European countries and had a major impact on the type of songs entered into the contest in the following years. Swedish participant Ingvar Wixell performed his song -originally called Annorstädes Vals - in English instead of Swedish while all the other participants sang in their native languages. This incident led to a rule change meaning that all participants would have to perform their songs in their respective national languages.

The capital city of Luxembourg was the home of the 11th Eurovision Song Contest. The rules for the contest were changed and national juries could include music experts again. The major change was that a rule was introduced stipulating that songs had to be performed in one of the official languages of the participating country. During the dress rehearsal, the Italian participant Domenico Modugno was not satisfied with the orchestra and left the stage in anger. It was uncertain if he was going to perform during the live show, but he sang his song Dio Come Ti Amo after all. The song later became a huge success in South America for Gigliola Cinquetti, the winner of the 1964 Eurovision Song Contest.

The 1967 Eurovision Song Contest took place at the Großer Festsaal der Wiener Hofburg in Vienna. The number of participants went down from 18 to 17 because Denmark chose to withdraw from the contest and would not come back to the contest until 1978. The contest had a very glamorous setting: the stage included three revolving mirrors and a staircase entrance in the middle. The juries had undergone a change as well, as half of the jurors in every national jury had to be less than 30 years old. During the voting the presenter of the show, Erika Vaal, declare the United Kingdom winner of the song contest before the last jury's votes were cast. However, the confusion about the voting would not make any difference: the United Kingdom clearly won the Eurovision Song Contest for the first time, nine years after participating for the first time. The winning entrant Sandy Shaw performed her song, Puppet on a String, barefoot.

France, Germany, the Netherlands, Norway, Sweden, Switzerland and the United Kingdom broadcast the 1968 contest in colour despite the fact that very few TV-viewers at home owned a colour TV set. However, colour was here to stay and all song contests since then have been broadcast primarily in colour. Some countries hired foreign singers to sing for them: Germany was represented by Norwegian Wenche Myhre and Austria's entry was performed by Karel Gott from Prague.

For the first time in the history of the Eurovision Song Contest, the outcome of the voting resulted in a tie for first place. Four countries gained 18 points each: France, the Netherlands, Spain and the United Kingdom. Since there was no solution for this situation, all four countries were declared winners. Luckily, there were four medals available to the four winning singers - the four medals were originally intended for the winning singer and three winning songwriters.

There were plenty of host countries to choose from as a result of the four-way tie in 1969; the Netherlands, the United Kingdom, France and Spain. Eventually, Amsterdam was chosen to host the fifteenth Eurovision Song Contest by the drawing of lots. For the second year in a row, the number of participants went down. Finland, Norway, Sweden and Portugal were all dissatisfied about the voting in the 1969 contest when 4 countries were declared winners and withdrew from the contest. To ensure that a similar incident did not happen again a tie rule was created. The rule stated that if two or more songs gained the same number of points, each song had to be performed once more. After these performances, the juries (with the exception of the countries that had tied) had to select their favourite song. This had to be done by the showing of hands. If entries still were to tie, both of them would share the first position.

For the first time in the history of the Eurovision Song Contest, Ireland hosted the event at the Gaiety Theatre in Dublin. Compared to 1970, the number of participants rose to 18 as Finland, Norway, Sweden and Portugal all returned to the contest after a year of absence. Malta also made its debut. The contest was broadcast in 29 countries. The rule of performing either as single or duet was abolished: now groups of up to six people were allowed to perform. In this year's Eurovision Song Contest, a new voting system was created: two jury members - one of them had to be younger than 25 - had to award between 1 and 5 points to each song. This created some problems because some juries gave fewer points than others. For example, Luxembourg awarded 43 points altogether compared to France's 107! In theory this meant that jury members could vote tactically, awarding few points and hoping to gain many.

The BBC stepped in to host the Eurovision Song Contest in 1972 and chose a venue outside of London for the first time. The contest was broadcast live to Asia for the first time with viewers in Japan, Taiwan, The Philippines, Hong Kong and Thailand, all able to watch the show. It also was the first year that a video wall was used to present song titles and artists.

For the third time in the 18-year-old history of the Eurovision Song Contest, Luxembourg had the honour of hosting the event with 17 nations present. After ending up in last position two years in a row, Malta decided to withdraw from the contest. Austria decided not to participate either. Instead, a new country joined the song contest, Israel. It was the first non-European country to enter the contest. Israel was allowed to do so because the country was already a member of the European Broadcasting Union. With the Israelis participating, the security control was unusually tight and special security measures were put in place for the Israeli delegation. Another important rule change for the 1973 Eurovision Song Contest was that the participants could choose the language in which they wanted to sing their songs. This rule remained in place until 1976 before being re-introduced in 1999.

1974 saw the first participation of Greece who sent their national star Marinella. France was to enter the song contest with the entry La Vie A Vingt-cinq Ans by Dani, but the French singer never got the chance to perform though as the French president, Georges Pompidou, died in the week of the contest and France withdrew. The voting system changed once more: 10 jury members in every country each awarded one point to their favourite song. For the first time, a draw of lots was used to decide the order in which countries would give the results of their juries. However, it was the last time this method was used to cast the votes - from 1975 onwards, a new voting system would be implemented where the order of the jury votes followed the order of performance.

A new voting system, still in place today, was implemented in 1975. Juries in each country awarded points to their top 10 songs: 12 to their favourite, 10 to the second, 8 to the third, and then from 7 down to 1. A record 19 countries took part. France and Malta returned to the contest and Turkey made its debut, while Greece withdrew. Norway's Ellen Nikolaysen performed for a rare third consecutive year. Portugal's entry was highly political, as singer Duarte Mendes dedicated his song to the country's peaceful revolution the previous year. Germany’s entry, Ein Lied Kann Eine Brücke Sein performed by Joy Fleming, saw a disappointing 17th place finish. However, the song has since become a major favourite among fans.

After being host of the 1975 Eurovision Song Contest, Sweden withdrew from the contest as Swedish TV thought that the contest had become too commercial. They were also afraid of winning again and having to host the expensive show so soon. Turkey and Malta withdrew as well, but Greece and Austria returned. 18 countries participated in the 1976 song contest altogether. Former Dutch Eurovision Song Contest winner Corry Brokken hosted the contest. The orchestra rules changed this year. For the first time, instrumental playback was allowed if certain passages in the music could not be reproduced by the live orchestra. Most of the countries decided to sing in English hoping that they might earn a better placing with this. The Yugoslav entry was sung by Ambassadori and it marked the last Yugoslav entry for five years - the country would only come back in 1981.

The 1977 Eurovision Song Contest took place at London's Wembley Conference Centre but was postponed for five weeks due to a strike by cameramen and technicians, moving from April 2nd to May 7th. 18 countries participated. Sweden returned, while Yugoslavia withdrew. Tunisia was also set to make its debut but withdrew its entry before the contest. The rule requiring participants to sing in their national language was reinstated. However, Germany and Belgium were granted an exception to perform in English because their entries had been selected before the rule was changed. Germany's entry, "Telegram" by the popular group Silver Convention, was highly anticipated but only finished in 8th place. Other notable acts included Austria's Schmetterlinge, who performed "Boom Boom Boomerang" while wearing masks on the backs of their heads, and Anita Skorgan, who made her debut for Norway with the song "Casanova".