KPN Telecom Building, Rotterdam, Netherlands designed by architect Renzo Piano completed in 2000. Next to it is the new De Rotterdam building nearing completion in 2013. (Photo by: Geography Photos/UIG via Getty
KPN building in Rotterdam, The Netherlands by V8 Architects
KPN Tower - Wikipedia
KPN Tower(KPN Office) - Renzo Piano
KPN Telecom building Rotterdam by Renzo Piano
V8 Architects to Expand Renzo Piano's Tilted KPN Tower in Rotterdam | ArchDaily