While in Brussels, he employed
David Teniers the Younger as keeper of his collection, spending immense sums on works by
Frans Snyders,
Peter Snayers,
Daniel Seghers,
Peter Franchoys,
Frans Wouters,
Jan van den Hoecke,
Pieter Thijs,
Jan van de Venne and others. He also acquired a number of Italian masters, purchased from the sale of collections owned by
Bartolomeo della Nave and
Charles I. His most prized pieces engraved in the book
Theatrum Pictorium, which is often called the first "art catalogue". When the tomb of
Childeric I, an early
Merovingian king, was discovered in 1653 by a mason doing repairs in the church of Saint-Brice in
Tournai, it was Leopold Wilhelm who had the find published in Latin. On his return to Vienna in 1656, his collection relocated to the
Hofburg Palace, where
Jan Anton van der Baren, a Flemish priest and artist, served as director. The collection was bequeathed to his nephew
Leopold I, and is now part of the collections of the
Kunsthistorisches Museum in Vienna. He played an active role in court politics and was close to his stepmother,
Eleonora of Mantua (1598-1655), who shared his interest in Italian art and was a prominent supporter of the Catholic
Counter-Reformation. Although suggested as a candidate to replace Ferdinand as Holy Roman Emperor in 1657, he ensured his nephew
Leopold I was
elected when he reached 18 in July 1658. File:Archduke Leopold Wilhelm of Austria.jpg|Bust of Archduke Leopold Wilhelm of Austria, by
Francois Dieussart (1656).
Kunsthistorisches Museum File:David Teniers the Younger - Archduke Leopold William in his Gallery at Brussels - Google Art Project.jpg|
Archduke Leopold Wilhelm in his Gallery in Brussels, by
David Teniers the Younger, c. 1650 File:David Teniers - Gallery of the Archduke Leopold Willem in Brussels KMSKB.jpg|Gallery of the Archduke Leopold Wilhelm in Brussels; by David Teniers the Younger, 1651 ==Ancestors==