Remsen Brinckerhoff Ogilby - 12th President of Trinity College, from 1920 to 1943.

Ogilby Hall - Dormitory in the North Campus area at the corner of Summit Street and Vernon Street.

Old Gymnasium - Trinity's first gymnasium (1871-1896).

Frederick Law Olmsted - Premier landscape architect in the United States during the nineteenth century.

Oosting Gymnasium - Part of the Ferris Athletic Center and home to Trinity's basketball, volleyball, and wrestling teams.

Organist - Brief history of the role of the college organist.

Original Campus - Trinity College's first location in downtown Hartford, now occupied by the State Capitol Building.