In the High Gothic period, thanks to the introduction of the four part rib vault, a simplified elevation appeared at Chartres Cathedral and others. The alternating piers and columns on the ground floor were replaced by rows of identical circular piers wrapped in four engaged columns. The tribune disappeared, which meant that the arcades could be higher. This created more space at the top for the upper windows, which were expanded to include a smaller circular window above a group of lancet windows. The new walls gave a stronger sense of verticality and brought in more light. A similar arrangement was adapted in England, at Salisbury Cathedral, Lincoln Cathedral, and Ely Cathedral.