| “ | Your War Ships and defensive buildings now trickle a tiny sum of Coin. | ” |
| —In-game description | ||
Öresund Customs is a technology available in Age of Empires III: Definitive Edition - Knights of the Mediterranean that can be researched at a Trading Post or Tambo built on a House of Oldenburg palace. Once researched, Warships and defensive buildings trickle coin equal to 0.05% of their total cost and 0.1% of their wood cost, respectively. There are a number of ships and buildings that do not adhere to the mentioned 0.05% and 0.1%; an extensive list of these is given below with their trickle and expected trickle:
Battleship: 1.125 coin (expected 1.0 coin)- Order Galley: 0.225 coin (expected 0.25 coin)
- Castle: 0.5 coin (expected 0.25 coin)
- Fort: 0.733 coin (expected 0.6 coin)
- Nobles' Hut: 0.25 coin (expected 0.2 coin)
- Palace: 0.25 coin (expected 0.2 coin)
