Baylor trustees began construction on Main Building in 1860, but the onset of the Civil War and financing problems halted work, leaving a one-story stone shell untouched until enough funds were secured to resume construction in 1880. In the 1880's a four-columned west-facing portico was also built, overlooking Baylor Female College and its four columns, and Baylor officials named their centerpiece Tryon Hall in honor of William M. Tryon. The building's exterior perimeter averaged 104 1/2 by 56 feet, with outer walls 36 inches thick, strong enough for two masonry stories and a third frame floor beneath a nearly flat mansard roof. Interior cross walls averaged 24 inches thick, creating central hallways about 9 1/2 feet wide with doors centered in each of the four walls and four elongated corner chambers averaging 42 by 18 feet. The first and second floors served as lecture halls and as subdivided classrooms, laboratories, reading rooms, and offices, while the third story contained a single chamber measuring 98 1/2 by 50 1/2 feet that served as a chapel and convocation hall. This space was named the Hosea Garrett Chapel in honor of the trustees' president, whose guidance was credited during terms from 1848 to 1868 and 1870 to 1888. The portico's exterior walls measured 20 by 16 1/2 feet, with a massive cut-stone west wall 29 1/2 feet north-south and 32 inches thick to support the four columns and a third story above, while the north and south sidewalls, running east to west, averaged 18 inches thick because each supported only one story of stone wall. Inside, the portico ground floor was a single room measuring 16 1/2 by 13 1/2 feet, and above it the open-air four-columned porch was enclosed by the mansard roof to form an anteroom from the chapel. Tryon Hall was never finished, though trustee minutes refer to Baylor commencements and trustee meetings there from 1882 to 1886, and it appears likely that daily classes were held in unfinished halls. After Baylor relocated, the chapel became Guardian Angels Catholic Church, but by the early 1920s all the buildings were abandoned. In 1933, Tryon Hall was demolished for building stone used in structures including Lueckemeyer's Store and Cotton Gin and the bell tower of Independence Baptist Church, and only the foundation remains today.