Alexander Milne Calder was an American sculptor son of a tombstone carver. He was born in Aberdeen, Scotland. He started his works in Scotland for sculptor John Rhind, the F/O sculptor J. Massey Rhind though attending the Royal Academy in Edinburgh. He shifted to London and did the job on the Albert Memorial. In 1868 Calder voyage to the United States and settled in Philadelphia, where he took lessons with Thomas Eakins on the Pennsylvania Academy of Fine Arts. He was appointed by architect John McArthur to generate models for the sculpture for the Philadelphia City Hall in 1873, which mission was to reside in Calder for the next 20 years. Alexander Stirling Calder and his grandson Alexander Calder were to be renewed into significant sculptors in the 20th century.