The redevelopment of the 122-year-old National Museum of Singapore from 2003 to 2006 has restored the entire building to its former glory, not only in terms of aesthetic beauty but also in the way the building was originally constructed. A key architectural highlight located at the new extension is a 16 metre high and 24 metre wide Glass Rotunda, and an 11 metre high and 22 metre long Glass Passage, which functions as the bridge between the colonial building and new extension.