Legend
The devil's wedding house
One night a well-dressed stranger asked the owner of a house on Rataskaevu street to rent him the rooms for a wedding party, and paid in gold. The owner agreed, but when he peeked in he saw that the guests had horns and tails: it was the devil's own wedding. Ever since, one window of the house has been kept shut and painted, so the devil can always come back and use it. If you look up, you can still see the painted window.
Open it on the map See the spot on the old maps and as it is today
Eesti keeles
Ühel õhtul palus peenelt riides võõras Rataskaevu tänava maja omanikku, et see annaks talle ruumid pulmapeo jaoks üürile, ja maksis kullas. Omanik oli nõus, aga kui ta sisse piilus, nägi ta, et külalistel on sarved ja sabad: see oli kuradi enda pulm. Sellest ajast peale hoitakse üht maja akent kinni ja maalituna, et kurat saaks alati tagasi tulla. Kui üles vaatad, näed seda maalitud akent praegugi.
Source: A Tallinn legend of the Devil's Wedding (Rataskaevu 16).