Lieven de Key (1560 – 17 July 1627) was a Flemish renaissance architect who after working in his native Flanders moved to work in the Dutch Republic.
[1] De Key was born in Ghent, and was already a well-known architect when the Haarlem council invited him to become city architect in 1592 to succeed Wouter den Abt.
Everything attributed to him or his followers, whether a building, a doorway, or merely a gable stone, is considered a rijksmonument today.
The reason so many buildings in Haarlem can be attributed to him is because Haarlem had suffered a severe fire in 1576 that destroyed a third of the city, and plans were underway for large city projects when he was appointed city architect.
In more recent times, many street names, buildings and e.g. one of the largest housing companies in Amsterdam,[3] have been named after him.