Can you identify this building from a small section of this historic map?

Let us know what building this is by tweeting @WhatBuilding to win a prize.*

*There is no prize

Old College Edinburgh

Old College is a building of the University of Edinburgh, Scotland. It is located on South Bridge, and presently houses parts of the University’s administration, the University of Edinburgh School of Law, and the Talbot Rice Gallery. Originally called the “New College”, it was designed by Robert Adam to replace a number of older buildings.