Sir Caspar Purdon Clarke CIE (21 December 1846 – 29 March 1911) was an English architect and museum director.

The eldest son, Caspar Stanley Clarke became assistant keeper of the Indian section of the Victoria and Albert Museum.

His acquisitions included the Hamzanama folios, early Mughal illustrations of the epic adventures of Hamza by northern Indian and Iranian artists.

In 1899 he was commissioned, in conjunction with architect William Young, to design the Indian hall at Elvedon, Suffolk by Edward Guinness, 1st Earl of Iveagh (1847–1927).

In 1904 the president and director of the Metropolitan Museum of Art in New York Luigi Palma di Cesnola died.

The American millionaire and art collector J. P. Morgan (1837–1913) assumed the duties as President of the Museum and hired Clarke to be its second director.

He was created a Companion of the Indian Empire (CIE) in 1883, and was knighted in the 1902 Coronation Honours,[2] receiving the accolade from King Edward VII at Buckingham Palace on 24 October that year.