Renaissance Europe saw advances in farming techniques, with the widespread use of the plow, crop rotation, and domesticated animals. Society was stratified, with artisans, merchants, priests, royalty, and other specialized occupations. The arts flourished as a rebirth of learning, with art focusing more on depicting the human form accurately. Cities grew large and were centers of trade, religion, and learning, though they also contributed to the spread of disease. Buildings like castles, cathedrals, and universities dominated the landscape, while homes ranged from stone to wood to mud depending on wealth. Changes in thinking began to challenge the Catholic Church's absolute power during this period.