When did scotsmen first wear kilts?

Why did Europeans want an all water route? How did the crowning of Charlemagne affect the power of the Pope? What was the sanitation system in the 18th century? Who made denim jeans and why? Why did the Muslims and crusaders fight? What advancement in technology revolutionized the way ideas were spread throughout western Europe in the 15th century? What are the three criteria for a civilization? What is the past tense of creep? What does someone mean when they refer to the west or east wing of a house? What is a Place where important cultural ideas begin and spread out known as? What advanced civilization excisted around the world at the first crusade? How did relation between Islam and the west change throughout the crusades? What seas touched the Roman empire? Is a city and civilization the same thing? Who was powerful in 1600's society? In the Middle Ages who believed in atoms? How did universities develop in the middle ages? Who was the first to declare vini vedi vici? What did the emperor Constantine do to the capital of Rome? What were the reasons for fighting the crusades?