This is the Robarts Library--affectionately called "Fort Book". It's the biggest of 32 libraries on campus. The total library collection includes over 13 million holdings (books, sound recording, audio/visual items, maps, etc.). In addition there are close to 13,000 full-text electronic journals and 200 online newspapers.
I took this picture from St. George Street, looking north. My new office is located on the ground floor, in the south-west corner (on the left in the picture above). Robarts is a triangular building which seems to lead to no end of confusion to those new to the building.