Satellite map of Sound Dues
The Sound Dues (or the Sound Toll; Danish: Øresundstolden, Swedish: Öresundstullen) were a toll on the use of the Sound which constituted up to two thirds of Denmark's state income in the 16th and 17th centuries.
Latitude: 55° 47' 13.79" N
Longitude: 12° 45' 1.79" E