Colonnade Colonnade In classical architecture, a colonnade is a long sequence of columns joined by their entablature, often free-standing, or part of a building. Paired or multiple pairs of columns are normally employed in a colonnade which can be straight or curved. The space enclosed may be covered or open. In St. Peter's Square in Rome, Bernini's great colonnade encloses a vast open elliptical space. When in front of a building, screening the door (Latin "porta"), it is called a portico, when enclosing an open court, a peristyle. A portico may be more than one rank of columns deep, as at
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,