Portrait of a man holding an open book  1660

Portrait of an Olivetan Monk 

An Old Man with an Open Book and a Child playing the Flut...  1649

An Unknown Young Man holding a piece of Paper  1725

Portrait of a Fortress Architect and his Wife  1660

Man sitting at a table with an open book  1830

An Unknown Man holding a Book  1649

Portrait of Johann von Megen  1622

Self-portrait Holding an Academic Study  1746

Man Holding Gloves 

Head of an Old Man