Great Colonnade at Apamea as part of the intersection. The colonnade was further intersected by side streets at regular intervals of . The colonnade passed through the center of the city and several important buildings were clustered around it, including the baths, the agora, the Temple of Tyche, the nymphaeum, the rotunda, the atrium church and the basilica. The street within the colonnade was wide and paved with large polygonal limestone blocks. On either side of the street a wide colonnade ran its full length. The columns were high and in diameter. They stood on square bases of on a side and high. The
Architectural terracotta of surface problems. When it rains, water and salts get sucked into the voids in and around the terracotta through capillary action. If it freezes then ice forms, putting internal stress on the material, causing it to crack from inside. A similar problem happens with atmospheric pollutants that are carried into the gaps by rains water. The pollution creates a mildly acidic solution that eats at the clay body or a salt crust forms, causing similar issues as ice. Architectural terracotta Architectural terracotta refers to a fired mixture of clay and water that can be used in a non-structural, semi-structural,