- Chief architect Philip Johnson was awarded the 1978 AIA Gold Medal and became the first laureate of the Pritzker Prize in Architecture in 1979 for his work on Pennzoil Place.
- The project was so successful at the outset that despite the mid-1970s recession the developer added two floors to each tower during construction to meet the demand for office space.
- Johnson/Burgee began the Pennzoil design in 1970. The entire complex was built between 1972 and 1976 and cost $50 million.
- Pennzoil chairman J. Hugh Liedtke specifically asked for buildings that did not look like One Shell Plaza.
- The two towers are separated by a 10-foot wide slot, and topped with 45° sloping roofs.
Also recorded for this building:
Interior designer, Developer, Steel supplier, Mechanical engineering, Light engineering, General contractor, Facade supplier, Structural engineering, Facade maintenance system supplier, Shell construction