The House of Oranje-Nassau, the Royal House of the Netherlands, earned at least 545 million euros from the Dutch colonies, where slavery was widespread. The figure has been adjusted for inflation, and covers the period from 1675 to 1770. It is one of the results of the investigation into the country's connection to the slave trade. The investigation was commissioned by the Ministry of the Interior and Kingdom Relations at the request of Members of the Tweede Kamer, the lower house of Parliament.