The Middle Ages were a time of great change across Europe, from the fall of the Roman Empire to the start of the Renaissance. The period saw the rise of feudal relations, the spread of Christianity and the birth of new cultural and social structures. Animals played an important role not only in people's everyday lives but also in their spiritual lives. Dogs and cats became a firm part of human life, the selective breeding of animals developed, and farming, hunting and trade flourished. Animals became important partners in many areas of life, from work in the fields to religious rituals.