Energy Plaza

This skyscraper was originally constructed for the Atlantic Richfield Company as their regional headquarters.  When the building opened, it was known as the ARCO Tower.  I.M. Pei & Partners designed this 49 story building located on the north side of Thanksgiving Square.  The building in plan is a set of three 30-60 degree triangles.  Each stop at a different level.  The first one is 6 stories tall, forming part of the base of the building.  The main shaft of the building utilizes two of the triangles, making the floor plate from the 7th to the 43rd floor an equilateral triangle.  The final 30-60 degree triangle is the tallest at 49 stories.  On top of the tower is a triangular communications tower that is modeled after the Eiffel Tower -- only smaller and three sided.  The principal tenant of the building is TXU, an energy services company, and late in the summer of 1999, their logo and the letters "TXU" were installed on all sides the tower.  Energy Plaza is the 9th tallest building in Dallas and with a height of 629 feet.