Look upwards

To see what's special about the architecture of Belfast's city centre, you have to look upwards. At street level, there are dozens of very run-of-the-mill premises, with a few honourable exceptions. At rooftop level, there are dozens of amazing sights, mainly dating back to the nineteenth century and the first decade of the twentieth.

Some of the rooftops are iconic; some may be more of a puzzle. How many of this selection can you identify? (My dad is the leading contender so far, with a very respectable seven out of eleven....)