Pieter van Kouwenhoorn aka Pieter Kouwenhoorn (1599 in Haarlem – c. 21 May 1654 in Leiden) (fl. 1620s - 1630s) was a Dutch botanical illustrator. Kouwenhoorn was a glass painter working in Haarlem and Leiden in the Netherlands, and was one of the teachers of the painter Gerard Dou (1613 - 1675) and Hendrick Jansz. van der Smient (c. 1600 - 1655). He also painted landscapes, portraits and mythological subjects.[1]
He was buried on 21 May 1654 from the 'Hooglandse Kerk' in Leiden.