He is the first commercially successful rapper and the first to sign with a major record label."The Breaks", a single from his 1980 self-titled debut album, is the first certified gold record rap song for Hip Hop.
A corbel arch is an arch carries the thrust of weight to its sides. It uses a post-and-lintel, in which the lintel supports all the weight above it. A corbel arch is unique because it is the oldest form of arch known in architecture.