Stuck in traffic heading under Bartle Hall, the convention center. This building has 388,800 square feet of column free space due to the 300 ft pylons supporting the roof. This is the largest column free convention center in the world. As you can see it is built over 6 lanes of traffic on I-70. The building was designed and constructed to achieve green building standards and received a LEED silver rating. This building was built in 1984.