The Sydney Opera House. It is a multi-venue performing arts centre in Sydney, New South Wales, Australia. It is one of the 20th century's most famous and distinctive buildings.
The answer to the question is Option A. (Gothic Cathedrals)
The Gothic style of building cathedrals originated in France in the 12th century. One of the distinguishing characteristics of Gothic Cathedrals was that their walls were more or less like a skeletal frame, allowing space for extensive decoration with mosaics of stained glass windows.