crisis re-construction, the centre of Rotterdam has become the site of the ambitious new architecture. Rotterdam is also famous for its Lijnbaan 1952 by architects Broek en Bakema, Peperklip by architect Carel Weeber, Kubuswoningen or cube houses designed by architect Piet Blom 1984. The newest landmark in Rotterdam is the Markthal, designed by architect firm MVRDV. In addition to that, there are many international well-known architects based in Rotterdam like O.M.A (Rem Koolhaas), Neutelings & Riedijk and Erick van Egeraat to name a few. Two architectural landmarks are located in the Lloydkwartier: the STC college building and the Schiecentrale 4b. The construction of the Depot of the Museum Boijmans Van Beuningen was started in 2003 and was officially opened by king Willem-Alexander on 5 November 2021. It is the world's first fully accessible art depot. Rotterdam also houses several of the tallest structures in the Netherlands. The Erasmusbrug (1996) is a 790-meter (2,600 ft) cable-stayed bridge linking the north and south of Rotterdam. It is held up by a tall pylon with a characteristic bend, earning the bridge its nickname 'De Zwaan' ('the Swan'). Rotterdam has the tallest residential building in the Netherlands: the De Zalmhaven Tower (). Rotterdam is also home to the tallest office building 'Maastoren' () which houses Deloitte. This office tower surpassed the 'Delftse Poort' () which houses Nationale-Nederlanden insurance company, part of ING Group as tallest office tower in 2009. The skyline of Rotterdam also houses the tall Euromast, which is a major tourist attraction. It was built in 1960, initially reaching a height of ; in 1970, the Euromast was extended by . Rotterdam has a reputation for being a platform for architectural development and education through the Berlage Institute, a postgraduate laboratory of architecture, and the NAi (Netherlands Architecture Institute), which is open to the public and has a variety of exhibitions on architecture and urban planning issues. Over 30 new highrise projects are being developed. A Guardian journalist wrote in 2013 that "All this is the consequence of the city suffering a bombardment of two things: bombs and architects." Sports Rotterdam calls itself Sportstad (City of Sports). The city annually organises several world-renowned sporting events. Some examples are the Rotterdam Marathon, the World Port Tournament, and the Rotterdam World Tennis Tournament. Rotterdam also organises one race of the Red Bull Air Race World Championship and the car racing event Monaco aan de