Amsteldok is a large office building on Amsteldijk and Trompenburgstraat in the South of Amsterdam. It was designed by the Rotterdam based architect Huig Aart Maaskant. Until 2019 the building was called Rivierstaete.

Rivierstaete was built between 1967 and 1973 and used to be the largest office building in Europe at a cost of 40,000,000 guilders. A metal sculpture by André Volten was placed in the Trompenburgstraat in 1972 during the construction period. The building had eight floors in staggered layers. The outside walls were covered with white tiles, making the building stand out among red brick residential buildings. 'The Monkey Rock' soon became the nickname of the Riverstaete buidling.

Several companies were located in the building. The Spyker automobile factory was built here at the beginning of the 20th century, after which the Nestelroy Trompenburg paper factory settled here, which was liquidated in 1968. The consulates of Peru and the Republic of Ivory Coast and the IT departments of the University of Amsterdam and the Hogeschool van Amsterdam were also located in the building. Currently WWP, Ogilvy and UberEats are located in the Amsteldok.

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