Why did bishops build very impressive cathedrals?

Bishops built impressive cathedrals to symbolize the power and importance of the Church in medieval society, demonstrating both spiritual and temporal authority. These grand structures served as centers of worship, community gathering, and pilgrimage, reflecting the glory of God and the Church's role in the lives of the faithful. Additionally, cathedrals were often designed to inspire awe and devotion, reinforcing the bishops' status and attracting donations and support. Overall, they were a manifestation of faith, ambition, and the desire to leave a lasting legacy.