The third phase would have consisted of a 400-unit luxury apartment complex across Harwood Street, on land now occupied by the Sheraton Dallas Hotel convention facility.

[1] During construction on October 11, 1978, a crane fell 27 stories from the roof and crashed to the ground, killing a worker, injuring others, and punching several holes in the side of the tower.

[2] It changed ownership again during the 1990s as nearby development made the building more attractive; adjacent Bryan Street was closed to auto traffic for DART's St. Paul Station, which opened in 1996.

[4] Street sign announcing the construction and leasing information of the tower was shown in opening scene of season 1 episode 3 of Dallas in 1978.

The two triangular notches on the sides of One Dallas Center create added interest and provide four additional corner offices on each floor.

[5] One Design Center has an extensive permanent collection of art which includes works by Dallas-based artist, JD Miller.

It included one 1.7 million-square-foot office building (twin hexagonal towers joined at the 16th and 23rd floors) and a separate 500-room hotel with semi-circular windows on four sides.