Well, this turned out to be harder than I was expecting. Story of my life 🙂 The districts that are marked with colours were the easiest part, but even that wasn’t all that easy. Then there’s a lot of text, but it was so small that I had to use a magnifying glass all the time. On the right, there’s a list of notable buildings, and even a section on buildings that were being built in 1876. On the left, there’s a list of the blocks for each district (the blocks in the oldest parts of Helsinki have names in addition to numbers, and often they’re named after animals).
This is a puzzle by the in-house brand of board game store Lautapelit.fi, but it’s not their best work, unfortunately. The fit was a bit off, but not too bad, and there was a good mix of piece shapes.
The place where I live is to the north of this map, I guess that was just wilderness in 1876 🙂