Jacob van Aaken was an architect who worked in the Netherlands.
[3] On 28 May 1529, the city council of Leeuwarden chose van Aaken's design for a new church; van Aaken was simultaneously appointed as the architect overseeing its construction.
[4] According to a copy of the agreement (the original is lost) that is now archived in the Historisch Centrum Leeuwarden, van Aaken received 8 stuivers a day, accommodation in the shape of a house for the six years building of the tower, and 'fair, new clothing' (in Dutch: 'eerlyk niuw kleed'.
In 1532, Van Aaken died, reputedly from his bad temper.
Cornelis Frederiks continued the work in Leeuwarden after van Aaken's death.