It repeatedly diminished in size until dissolving into the city of Pittsburgh in 1868 .
Pitt Township was one of the original townships created with the formation of Allegheny County , Pennsylvania in 1788 .
Pitt Township repeatedly diminished in size until dissolving into the city of Pittsburgh in 1868 .
Pitt Township was one of the original townships created with the formation of Allegheny County , Pennsylvania in 1788 .