The retractable roof of Mercedes-Benz Stadium was open Saturday as Atlanta United defeated Philadelphia 3-1 in a MLS match.

Click through a photo gallery (above) from the AJC's Curtis Compton.

The roof was open for a Falcons game Sept. 17 and an Atlanta United game Oct. 22, but otherwise it has been closed for events in the $1.5 billion-plus stadium. Once automation work is completed, officials with the teams and stadium have said they will routinely determine whether the roof will be open or closed for Falcons and Atlanta United games based on weather conditions and the comfort and safety of attendees.