The next ingredient is painted tile. In Spanish architecture a superbly curved staircase and hand painted tiles on the stair risers. One other appealing component is terracotta roof tiles. The clay roof tops in fresh eye catching colour give the homes a heat and earthy look. It is typically found the roof lines are multi-level to create interest and asymmetry. The next factor of the Spanish architecture is Tower-like chimneys. The functional chimney is given special therapy with little windows. Architecture.