Even those outside the realm of design likely know the name Frank Lloyd Wright. Quite possibly America’s most well known architect, Wright’s work was recently added to the list of UNESCO Heritage Sites.

Eight of his buildings, including homes, a church and a museum, have been recognized by UNESCO, the United Nations Educational, Scientific and Cultural Organization. Aside from his world renowned buildings, such as his iconic Fallingwater, Wright has left an indelible mark on the generations of architects who came after him. Characteristics pioneered by Wright include open plans, blurring the line between indoors and outdoors and a prominent use of materials such as steel and concrete.

Wright’s designs are also known for being far ahead of their time, with buildings such as Chicago’s 110-year old Robie House and New York’s 60-year old Guggenheim Museum looking just as modern as structures from the past decade. As architectural historian William Richards notes, “Wright’s work was unique because he was unique.”