A view of two core Peachtree Center office buildings, with their Promenade in the middle. The structure on the left, originally known as the Gas Light Tower (now the Peachtree Center North Tower), was completed in 1968. On the right is the Peachtree Center South Tower, whose first tenants moved in in 1970.
Photo from http://portmanholdings.com / Portman Holdings

In a skyward vista we see what was originally the Peachtree Center Tower on the left, along with a small section of the Merchandise Mart. A skybridge connects the Mart with the Gas Light Tower (or North Tower) across the street.
Photo from http://portmanholdings.com / Portman Holdings