The Gothic cathedral was one of the most awe-inspiring achievements of medieval technology. Architects and engineers built churches from skeletal stone ribs composed of pointed arches, ribbed vaults, and flying buttresses to create soaring vertical interiors, colorful windows, and an environment celebrating the mystery and sacred nature of light. Based on empirical technology, the medieval cathedral provided the Middle Ages with an impressive house of worship, a community center, a symbol of religious and civic pride, and a constant reminder of the power and presence of God and the church.