A Medium clipper is a type of clipper designed for both cargo carrying capacity and speed. An evolutionary adaptation of the extreme clipper, the medium clipper had been invented by 1851, when the hull type appeared in U.S. shipyards. Medium clippers continued to be built until 1869, when the Glory of the Seas, one of the last known medium clipper ships to be built, was launched by the firm of Donald McKay & Co.