Bulgaria's largest art museums are located in the central areas of the city. Since 2015, the National Art Gallery, the National Gallery for Foreign Art (NGFA) and the Museum of Contemporary Art – Sofia Arsenal were merged to form the National Gallery. Its largest branch is Kvadrat 500, located on the NFGA premises, where some 2,000 works are on display in twenty eight exhibition halls. The collections encompass diverse cultural items, from Ashanti Empire sculptures and Buddhist art to Dutch Golden Age painting, works by Albrecht Dürer, Jean-Baptiste Greuze and Auguste Rodin. The crypt of the Alexander Nevsky cathedral is another branch of the National Gallery. It holds a collection of Eastern Orthodox icons from the 9th to the 19th century.