According to Cornelis Plemp, a pupil and friend of Sweelinck's, he started his 44-year career as organist of the Oude Kerk in 1577, when he was 15.
Ifølge Cornelis Plemp, en elev og en ven af ​​Sweelinck's, startede han sin 44-årige karriere som organist for Oude Kerk i 1577, da han var 15.