A U.S. military base was located in Giessen after the Second World War. The U.S. Army Garrison of Gießen had a population of up to 10,000 American soldierts and their families. Gießen was also the site of the central US army depot for all of Europe as well as the site of a special ammunition depot. The base is a converted German Army Air Field which is reflected in some of the buildings including the housing area. A theatre, known as the Keller Theatre, is a converted German Army Officers' Club. As of 28 September 2007, the Giessen Depot and all other U.S. facilities in the greater Giessen area were turned back to local German authorities. The former U.S. Army buildings were used to house refugees after the large intake of 2016.