He collected thousands of inscriptions in Yemen that are today held by Kunsthistorisches Museum.
In fact, there are few extant paintings that scholars agree are his; these include View of Saragossa (1646, Prado); Portrait of Queen Mariana in Mourning Dress (1666, National Gallery, London); and The Family of the Painter (c. 1660–1665, Kunsthistorisches Museum, Vienna).
They had donated many of the art-works in the Kunsthistorisches Museum, and, in their palatial salon opposite the opera, Hugo von Hofmannsthal had read his first poems.
The pieces are on display in the Kunsthistorisches Museum in Vienna and the National Museum of History, Sofia.
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Bruegel's paintings in the Kunsthistorisches Museum are shown in the 2012 film, Museum Hours, where his work is discussed at length by a guide.
With the exhibition “Roberto Capucci l’Arte Nella Moda - Volume, Colore e Metodo” in 1990 at Palazzo Strozzi in Florence, his explosive season began with big praise of critics and audiences in the most important museum of the world, including Kunsthistorisches Museum (Wien), Nordiska Museet (Stockholm), Puskin Museum (Moscow), Museum of Art of Philadelphi
Other works of König are in Paris Louvre, in the Kunsthistorisches Museum in Vienna, the art gallery in Berlin, the Hessian State Museum in Darmstadt, the Staatliche Kunsthalle in Karlsruhe in National Museum of Germanic in Nuremberg and the Ashmolean Museum in Oxford.