The fourth largest city in the Netherlands (7)
I believe the answer is:
utrecht
(Other definitions for utrecht that I've seen before include "Dutch city where peace treaties were signed to end the 1701-14 War of the Spanish Succession" , "Dutch city whose name was given to a 1713 treaty" , "Dutch city, province; Seventeen-thirteen treaty" , "European city" , "Netherlands city, scene of 1713 Treaty" .)