He closely supervised the construction of all his warships and their guns, knowing their designs, speed, tonnage, armaments and battle tactics. He encouraged his naval architects, who perfected the Italian technique of mounting guns in the waist of the ship, thus lowering the centre of gravity and making it a better platform. He supervised the smallest details and enjoyed nothing more than presiding over the launching of a new ship.[13] He drained his treasury on military and naval affairs, diverting the revenues from new taxes and the sales of monastery lands.[14][15][16]