Picture from here.
There are three Ginkgo trees in Marquette that I know of:
1) The south east corner of the Marquette Courthouse
2) Lower Harbor left of the marina building --about 5 trees to the left
3) 1200 block of North Front Street - the south east corner of Kaye and Front
There was a female Ginkgo tree on DePauw's Campus--just outside the library and every fall it would drop berries that would smell terribe! A few years ago they chopped down the big and old tree -- it was probably about 75 years old and stunk every fall that entire time. Hoping the Marquette trees are not female versions.