National Monument different cities in the Netherland, proposal. In 2006, it was the jubilee of the National Monumant on Dam Square in Amsterdam. The monument was design by architect P. Oud and artists John Readecker and Paul Grégoire (reliefs). For this jubilee year, Hofman suggested to let a true size inflatable replica travel from province capital to province capital. The start should be on the 5th of May, Holland's Liberation Day. It's debut will be at Dam Square, in front of the Royal Palace, mirroring the original monument.