He became stadtholder of Holland and Zeeland in 1585, of Guelders, Overijssel and Utrecht in 1590 and of Groningen and Drenthe in 1620 (following the death of Willem Lodewijk, who had been Stadtholder there and in Friesland).
Siricij je bil rimski škof (papež) Rimskokatoliške cerkve od 22. december 384 do 26. november 399.