Antwerp / Anvers, BELGIUM - Boat Basin: Antwerp is a city in Belgium, and is the capital of Antwerp province in Flanders. With a population of 520,504, it is the most populous city proper in Belgium. Antwerp is on the River Scheldt, linked to the North Sea by the river's Westerschelde estuary. It is about 40 kilometers (25 mi) north of Brussels, and about 15 kilometers (9 mi) south of the Dutch border. The Port of Antwerp is one of the biggest in the world, ranking second in Europe. The city is also known for its diamond industry and trade. Both economically and culturally, Antwerp is and has long been an important city in the Low Countries, especially before and during the Spanish Fury (1576) and throughout and after the subsequent Dutch Revolt. Antwerp was also the place of the world's oldest stock exchange building, originally built in 1531 and re-built in 1872. The inhabitants of Antwerp are nicknamed Sinjoren , after the Spanish honorific señor or French seigneur, "lord", referring to the Spanish noblemen who ruled the city in the 17th century. This Divided Back Era (1907-15) postcard is in good condition.