Fondation Custodia. The Fondation Custodia is an art museum in the 7th arrondissement of Paris, focusing on European Old Master works, including works by Dutch, Flemish, Italian and French artists. The museum was founded in 1947 by the collector and art historian Frits Lugt to house his collection of drawings, prints and paintings. Located at 121 rue de Lille, it occupies the Hôtel Turgot, an 18th-century mansion. The collection, continually added to that formed by Lugt, includes works by Dutch, Flemish, Italian, French, Danish, British, German artists, and features over 7,000 Old Master drawings, 30,000 prints, and 220 paintings. The focus of the prints is Dutch and Flemish artists of the sixteenth and seventeenth centuries. Artists in the collection include Leonardo da Vinci, Albrecht Dürer, Raphael, Rembrandt, Peter Paul Rubens, Hans Holbein the Younger and Pieter Brueghel the Elder. It also comprises many hundreds of artists' letters.