A century of progress in the field of architecture was honored on U.S. #1089. The stamp features a Corinthian-styled capital – a Classic Greek style of architecture. An architectural capital is a decorative part on top of a pillar or column. The Corinthian style began to replace the less ornamental Roman Ionic style in the first century after Christ was born. Corinthian capitals feature three rows of carved foliage called “acanthus leaves” – a style often found on early U.S. stamps. American Architects Establish Professional Organization A group of 13 architects gathered in New York City in February 1857 to “promote the scientific and practical perfection of its members.” The result was the founding of the American Institute of Architects. The society sought to establish professional standards for architects, as well as promote the practice of architecture. Other chapters grew slowly, and included most of the major cities on the East Coast by the 1880s. Currently, there are about 300 chapters of the AIA throughout the nation and around the world.