Jeweler’s Row was designed by builder and architect Thomas Carstairs circa 1799 through 1820, for developer William Sansom, as part of the first speculative housing developments in the United States, and introduction of the Row house in the United States. Carstairs Row was built on the southern part of the site occupied by "Morris' Folly" – Robert Morris’ unfinished mansion designed by Pierre Charles L'Enfant. Sansom bought the property and unfinished house ofRobert Morris, on Walnut St. between 7th and 8th Sts. He bisected the land with a new east-west eponymous street. Carstairs purchased the south side of Sansom St. and erected 22 look-alike dwellings. Prior to this time houses had been built not in rows, but individually. It can be contrasted with Elfreth's Alley where all the house are of varying heights and widths, with different street lines, doorways and brickwork. The grid patternlaid down by William Penn and continued by subsequent planners and surveyors heavily influenced the row house form of architecture. The block of row houses is an important example of Philadelphia’s architectural and developmental history. Sansom erected the buildings on what was then the outskirts of Philadelphia. To attract tenants he paved Sansom Street at his own expense. He then hired Benjamin Latrobe to design another row on the 700 block of Walnut Street. A prominent feature of the street is the repetitive flat expanse of the buildings, which made it ideal for commercial conversion. In 2016, real estate companyToll Brothers obtained a zoning and demolition permit to construct a twenty-nine story tower of condominiums on the 700 block of Sansom Street. Specifically, five buildings from 702 to 710 Sansom would be demolished. This decision has been met with fierce local opposition, with signs denouncing the project appearing in the windows of several buildings on Sansom Street, as well as criticism from Philadelphia Inquirer architecture columnist Inga Saffron.
Changes throughout the years
Alterations in the late 19th and early 20th centuries changed most of the row – only 700, 730 and 732 Sansom retained their original experience. 710 Sansom, built in 1870, is a three-story commercial building with stone lintels. Its Victorian style is typical of the buildings that became the center for jewelry and diamond merchants who developed Jewelers’ Row in the mid-19th century. 722 Sansom was originally built in the 1860s and was redesigned in the early 1900s when steel became available. 724 Sansom, built in 1875, has a cast iron first floor. After the homes were sold for commercial interests, several engravers of plates for books moved in. At 732, the engraver for Edgar Allan Poe lived and worked. His customer, Poe, ate dinner in the house on several occasions.
