Great Colonnade at Palmyra The western colonnade was the first section to be built. Inscriptions found on some columns confirm that works started before 158 CE. The straight avenue ran in northwest-southeast direction and stretched for , the longest of the three sectors. The main avenue's width was while the side streets were in width. The colonnade's western terminus, the West Gate, was built in the late second-century CE. The avenue also connected in a right angle to the Transverse Colonnade which stretched to the Damascus Gate in the south. The eastern sector of the Great Colonnade started at the Monumental Arch and stretched
White Pine Series of Architectural Monographs photographs and measured drawings complemented the "Comparative Details" feature which published construction details for contemporary projects. The Monograph series was ended abruptly in June 1940. Many of its contributors became involved in the Historic American Buildings Survey. Eagerly collected by architects and historians, the monographs have been re-issued in bound editions several times. In 1987 the National Historical Society of Harrisburg, Pennsylvania began publishing a series of hardbound books, the Architectural Treasures of Early America, drawn entirely from the "White Pine Monographs". They reorganized the individual editions into geographic regions and re-set all the type in order to produce a