| Flag | Date | Designer | Description | Sources |
| | 1920 | Unknown | Obverse and reverse of the European flag proposed in an anonymous pan-European brochure from 1920. | |
| | 1930 | Unknown | Anonymous sketch flag for the United States of Europe | |
| | 23 August 1949 | Camille Manné | Flag proposal by Camille Manné, a Strasbourg Citizen, which incorporated all the colours of the European flags, made by doing a statistical analysis of the colours of the European flags. Its design is in the form of four horizontal stripes, blue, green, yellow and black, and a chevron horizontally divided in red and white adjacent to the hoist. The chevron also has the colours of Strasbourg. | |
| | 5 June 1950 | Coudenhove-Kalergi | The count Richard Coudenhove-Kalergi proposed to Jacques-Camille Paris, Secretary General of the European Council, about using the Paneuropean movement flag. | |
| | 15 July 1951 | Martin-Levy | One of the curators of the Strasbourg Museum and member of the Secretariat-General, Martin-Levy, proposed a white ground with a green cross bearing in the centre the coat-of-arms of the Town of Strasbourg. The cross is shifted slightly towards the hoist in the manner of Scandinavian flags. | |
| | Coudenhove-Kalergi | The Count Coudenhove-Kalergi proposed a white flag bearing a red symmetrical cross, also known as the flag of St. George. | |
| | Prince de Schwarzenberg | The Prince de Schwarzenberg proposed that the "first European symbol", the labarum of Constantine, should be adopted. A red flag with a yellow symmetrical cross. | |
| | Lucien Philippe | Fifteen five-pointed green stars in three rows on a white ground. | |
| | Louis Wirion | Louis Wirion, Luxembourg expert in heraldry, proposed a design based on the Martin-Levy proposal, reversing the colours and doing away with the Strasbourg coat of arms. However he agreed that the white ground should be left with a green cross provided the Strasbourg coat of arms at the centre was only used for the pennants of Council personages and flags flown on Council buildings, and omitted in all other cases. | |
| | Sommier of Neuilly | Sommier proposed a design based in the European Movement flag, with a green "E" detached from the hoist over a white ground. | |
| | Alwin Mondon. | Alwin Mondon, a cartographer of Bad Godesberg, proposed a white triangle, symbol of culture, on various fields. | |
| | Another Mondon project. | |
| | Another Mondon project using fleur-de-lis. | |
| | Muller of Wiesbaden | Muller of Wiesbaden proposed a red flag bearing the word "Europa" in gold lettering, with a golden sun and a white hand making the sign of the oath. | |
| | Harmignies | Harmignies suggested creating a new heraldic device: a Cross of Europe. This cross would consist of four "E"s backed on to a square. He proposed a flag consisting of a green Cross of Europe on a white ground. | |
| | Poucher | Poucher proposed a federal flag which was virtually the reverse of the flag of the United States of America, with blue bands and a red quarter in one corner. | |
| | H.C.? | proposed a horizontally-divided blue-red flag, the upper blue and the lower red. This is the international code sign of the letter "E". Furthermore, these two colours also correspond to those generally adopted by the right and left wing parties respectively. | |
| | 26 September 1951 | Coudenhove-Kalergi | A slight variation of the Paneuropean movement flag that the count Cudenhove-Kalergi proposed but later verbally expressed his intention of withdrawing his proposal. | |
| | J. E. Dylan | In January 1951 J.E.Dylan proposed on a letter this and other flag with the Star of Liberation surrounded by stars (one for each union member). He also proposed these two designs to have a blue background. The council put forward this proposal, which had a green flag with a white and red Star of Liberation, and the Strasbourg coat of arms on the upper left-hand corner. The star in a circle was in 1944-5 the insignia of the armies of Liberation. | |
| | Unknown | A similar design to Louis Wirion's flag proposal, but the cross is symmetrical. This design was proposed by those who believed that a green cross on a white background would be too easily soiled. | |
| | Unknown | A white Cross of St. Andrew over a green ground. The cross represents one of the oldest and most popular European emblems which has appeared in the case of the Cross of Burgundy, emblem of the "Grand Duchy of the West". | |
| | 15 October 1951 | Arsène Heitz | Arsène Heitz proposed a green flag, colour of Charlemagne's standard which the Pope Leo III gave to him at his coronation, and a red cross fimbriated in yellow. Red depicts the bloodshed in fratricidal struggles and yellow being the colour of the Pope and Christianity. | |
| | Arsène Heitz | Slight variation of the Cross of St.George, with the heart of the cross located closer to the hoist, in the style of the Nordic Cross. Probably inspired or derived from Count Coudenhove-Kalergi's proposal, so that it wasn't a replica of England's flag. | |
| | 1 December 1951 | Salvador de Madariaga | Salvador de Madariaga chose to depict each capital of the member states at that time with a star. The bigger star depicted Strasbourg. Stars were chosen as they depicted the country, but without the need of frontiers. Furthermore, they were eight-pointed depicting the eight chief directions of the compass. | |
| | 5 January 1952 | Arsène Heitz | A green standard, colour of Charlemagne's standard, with a red cross fimbriated with gold. Each member state, when using the flag, could insert their coat of arms in the heart of the cross. | |
| | 12 May 1952 | Paul Levy | Turkey objected to the Paneuropean proposal due to the fact that there was Christian representation with the red cross, but no Islamic representation. Therefore, Paul Levy proposed adding a small crescent at one of the upper corners of the sun in the flag. | |
| | 15 November 1952 | Arsène Heitz | Set of European flags which start to resemble more the actual flag of the EU. They show circles of yellow five-pointed stars on a blue field. Heitz, as in his previous January proposal, he suggested that each member state could add its own flag to the design. | |
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| | 25 September 1953 | Members of the Council of Europe | Fifteen golden five-pointed stars in a circle representing union, over a blue (azure) background. (on the official documents, "sky-blue" does not refer to the shade, but to the symbolism of the colour. The French translation, the heraldic description and hatching pattern, and colour illustrations make it clear that the background was azure (blue) and not light blue.) | |
| | 12 November 1954 | Arsène Heitz | Blue flag with a yellow eight-pointed star in a red circle. The design is probably inspired in the Paneuropean flag, but instead of having a yellow cross, the shape of a compass rose is added to represent all of Europe. | |
| | 25 December 1954 | Blue flag with a red and white eight-pointed compass rose in the middle, probably chosen so that all member states felt represented. | |
| | 11 September 1955 | Blue flag with a star in the middle surrounded by twelve secondary stars. This is the most similar flag to the current one, with 12 stars instead of 15, and a star in the middle to probably represent Strasbourg or union. | |
| | 9 December 1955 | Committee of European Ministers | Blue field with a five-pointed 12-star circle | |
