Knoxville, and Murfreesboro, before being moved to Nashville in 1826. The 1835 state constitution mandated that the General Assembly choose a permanent capital. In 1843, Nashville was chosen as the capital. The prominent Nashville hilltop site of what is now the Tennessee State Capitol was formerly occupied by the Holy Rosary Cathedral (no longer extant), the first Roman Catholic cathedral church in Nashville (with the Diocese of Nashville at that time once comprising the entire territory of the State of Tennessee). The property was purchased by the city of Nashville for $30,000, and conveyed to the state government for $1. Design and construction The State Capitol was designed by renowned Philadelphia architect William Strickland, who modeled it after a Greek Ionic temple. The prominent lantern structure located above the roof line of the Tennessee state capitol is a design based upon the Choragic Monument of Lysicrates in Athens that honors the Greek god Dionysus doing battle with Tyrrhenian pirates. The cornerstone of the Tennessee state capitol was itself laid on July 4, 1845 and the building was completed fourteen years later in 1859. Its final cost was approximately $900,000 (). The American Society of Civil Engineers has designated the building as a National Historic Civil Engineering Landmark in recognition of its innovative construction, which made unusually extensive use of stone and was an early example of the use of structural iron. Both the interior and exterior are built with limestone from a quarry about from the site. Some interior columns were built from single pieces of stone, requiring massive wooden derricks to hoist them into place. Wrought iron, instead of wood, was used for the roof trusses to reduce the building's vulnerability to fire. Commercial, convict, and slave labor were used in the project. Fifteen enslaved Black men worked on carving the Capitol's limestone cellar from 1845 to 1847; Nashville stonemason A.G. Payne was paid $18 a month for their labor. It is believed to be "the most significant project where the [Tennessee] state government rented slave labor". Strickland died five years before the building's completion and was entombed in its northeast wall. His son, F. W. Strickland, supervised completion of the structure. William Strickland also designed the St. Mary's Cathedral (located along the base of the capitol hill), as well as Downtown Presbyterian church located just a few blocks away from the state capitol. Samuel Dold Morgan (1798–1880), chairman