What was the pope urbans second main reason for calling for the first crusade or war of the cross?

What western boundary did all the colonies have in common? What helped cause the Renaissance in Northern Europe? Trade and commerce between civilizations helped to? Which development will be the most important thing in encouraging the growth of the cattle industry in the 1800th century? What were two main reasons for European exploration? What are the list of non western countries in the world? What is the time frame millennium? What was the divorce rate like in the medieval times? What important events happened in Europe in 1920? Was the period between the fall of Rome and the Renaissance a dark age? What is the Roman forum? What did medieval nobles wear? How did Marc bolan die? When did the holy roman empier begin? What century is 1991? Why did the Holy crusades occur? What happened to a gladiator when they lost? How much did a cow cost in the 1700s? When did Christianity become the official religion of Roman Empire? What was the purpose for the third crusade?