Arquebuses and hand-culverins are the most advanced weapons
Galleons, Frigates and Battleships are made of wood. Boats are powered either by wind or rowing.
Any non-electronic musical device is ok.
Printing press has not been invented.
Cannons are acceptable, but rare.
Carriages and horses are the fastest way to travel on land.
Any electronic device is banned.
Steam power is not discovered.

Does this help in any way?