If you visit Belfast, you might want to print out the Museum in the Streets map on the attached website or check with the Belfast Historical Society at 10 Market Street to see if they have a printed guide. The signs are in both English and French.
There are 30 panels with old photos and text describing significant buildings, people and historic events. We stopped by a few of the sights but didn't have time to do the whole tour.
Photo #1 is the White House, built in 1840 in the Greek Revival style, is now a B&B
Photo #2 is the First Church, oldest church in Belfast
Photo #3 is the intersection of Main Street and High Street, the building in the photo is the Masonic Temple, dedicated in 1879
Even if you are not planning on staying in Belfast, be sure to go by the Jeweled Turret Inn, a beautiful Victorian home built in 1898 for a local attorney, James S. Harriman. The inn is named for the jewel like stained glass in one of the turrets.
The wooden carvings outside this shop appear to be recent creations mirroring the barnacle encrusted ones at the harbor shore. Be sure to search out both