Kirkside was the residence of Henry M. Flagler in St. Augustine, Florida. This colonial mansion was built in 1892-93 for Flagler by architect J. A. MacDonald. This home took up an impressive five acres, bordering Valencia, Riberia, and Carrera Streets. In 1950 the mansion was demolished and turned into 13 separate residential lots, however the columns of this old home survived, reused in the construction of Kirkside Apartments, located at Riberia and Carrera Streets.