The collections of the Photothèque now contain approximately 7,000,000 photos taken between 1855 and 2022. They have been built over the years through donations, bequests, acquisitions of collections and photo documentaries commissioned by the City. The Photothèque is continuously expanding its collections through new acquisitions.
- Pierre Bertogne (around 16,000 documents): documents reflecting life in our city before the war (centenary celebration), during the German occupation, during the country's liberation and in the early years of the post-war period.
- Marcel Duffau (around 200 documents): the City of Luxembourg from 1935 to 1945.
- Greg Fournelle (around 3,100 documents): artistic photos of the city and the Grand Duchy taken by photographer Greg Fournelle, from donations by Ernest Greg Fournelle and Luss Gérard.
- Auguste Jungblut (around 300 documents): views of the city taken between 1910 and 1925.
- Nic Loutsch (around 700 documents): the capital in the 1940s and 1950s as seen by photographer Nic Loutsch.
- Robert Matagne (around 600 documents): glass plates and photos by Batty Fischer and François Scharff-Vanière.
- Marcel Schroeder (around 50,000 documents)
- Tony Vaccaro (around 450 documents): Luxembourg by Tony Vaccaro 1944 – 1945: Luxembourg through an American's eyes.
- Bernard Wolff (around 500 documents): historical documents about the dismantling of the fortress of Luxembourg.
- Edward Steichen (44 documents): original artistic photographs.
- The Photothèque does not have a copyright for making copies.
- The Anen collection (photos of the Grand Ducal family).
- Tony Krier (around 620,000 documents): photo documentaries on Luxembourg City, the Grand Duchy and major events from 1939 to 1972.
- Marie-Georgette Mousel (around 500,000 documents): documents about current affairs from 1961 to 1991.
- Marcel Tockert: current affairs in the Grand Duchy from 1976 to 1980.
- Batty Fischer (around 10,000 documents): photographs showing views of the city from 1890 to 1958.
- Camille Aschman (600 glass plates): glass plates showing Luxembourg's Old Town, the suburbs, the Grand Ducal family, the Institut Emile Metz et Mayrisch (technical college), the country's liberation in 1944 by US troops.
- Pol Aschman (around 219,799 documents): negatives of current affairs in the Grand Duchy from 1935 to 1988 (streets and glass plates, historical figures, Schuman plan, Euratom, ECSC, cultural festivities in city's residential neighbourhoods, embassies, etc.).
- Vic Fischbach (around 800,000 documents)
- Jochen Herling (around 200,000 documents)
- Edouard Kutter, Sr. (around 850 documents): the Grand Ducal Court from 1900 to 1960.
- Edouard Kutter, Jr. (around 200,000 documents): photos of current affairs from 1950 to 1980 and events at the Grand Ducal Court.
- Théo Mey (around 485,745 documents): documents reflecting current affairs from the 1950s to the 1970s.
- Gaston Mirgain (around 18,035 documents): events in the city and across the Grand Duchy from 1949 to 1992.
- Remo Raffaelli (around 40,000 documents): artistic and sporting events from the 1970s to 1985.
- Pierre Schneider: received in 2010 from his daughter Christiane Schneider.
- Jean Weyrich (around 200,000 documents)
- Photo documentaries from 1950 to 1983 (around 200,000 documents): a series of photo documentaries made by various amateur and professional photographers on events from 1950 to 1983 (festivities, state visits, receptions, exhibition previews, etc.).
- Photo documentaries from 1984 to 2018: series of photo documentaries depicting the city (residential neighbourhoods, streets, buildings) by amateur Photothèque photographers and freelancers.