Thanks for information Fluffy, Sorry my fault. I haven't said which artillery picture. I said 72.4 KB artillery picture and number 12 is there. I didn't remember Triar bombe picture which you send to me. But It looks like this ship gun. This picture not Russian guns. They are Spanish armada guns I think. I've found Pinterest. I see Venice had strict arm dealing rules. But what if their alliance with Russia or other countries? Allies need guns and weapons. Maybe some of the guns could export this nation to harm the enemy. But I'm afraid I didn't have an information this arms dealing. I must search this and read more books.