sentences:  Its international network of museums expanded in 1997 to include the Guggenheim Museum Bilbao in Bilbao, Spain, and it expects to open a new museum, Guggenheim Abu Dhabi, in the United Arab Emirates after its construction is completed.The mission of the foundation is "to promote the understanding and appreciation of art, architecture, and other manifestations of visual culture, primarily of the modern and contemporary periods, and to collect, conserve, and study" modern and contemporary art.The Foundation seeks, in its constituent museums, to unite distinguished architecture and artworks.