On the occasion of the new construction of the Metaalhof museum depot and the Rocacentrale, the municipality of Rotterdam commissioned the creation of an autonomous sculpture with appearance. The design by visual artist Joost Baljeu was chosen and realized. The building, titled Space Time II, is a complex structure that was fabricated in parts and built on site. A little further on in Prince Alexander is another work of art by Baljeu, namely Space Time I. The stacked cube profiles not only relate well to their environment of commercial new construction and high-rise buildings, but also mark a special episode in the history of constructivism in the Netherlands. In 2000, Space Time II moved a few tens of meters at the request of the borough, more to the center of the square.