Rotterdam is the second-largest city in the Netherlands, after Amsterdam. A major logistic and economic centre, Rotterdam is Europe's largest port, and had previously been the largest port of the world for a long time. It has a population of 634,660 and is home to 174 nationalities. Rotterdam is known for its Erasmus University, its riverside setting, lively cultural life, maritime heritage and modern architecture. The near-complete destruction of the city centre in the World War II Rotterdam Blitz has resulted in a varied architectural landscape, including sky-scrapers (an uncommon sight in other Dutch cities) designed by renowned architects such as Rem Koolhaas, Piet Blom and Ben van Berkel.
source: Rotterdam - Wikipedia