Answer by taking a quote from the following article:

At Fillmore East is the first live album by American rock band the Allman Brothers Band, and their third release overall. Produced by Tom Dowd, the album was released in July 1971 in the United States by Capricorn Records. As the title indicates, the recording took place at the New York City music venue Fillmore East, which was run by concert promoter Bill Graham. It was recorded over the course of three nights in March 1971 and features the band performing extended jam versions of songs such as "Whipping Post", "

The band devised the cover idea for At Fillmore East rather than leaving it in the hands of Atlantic executives (Allman was particularly disgusted with the artwork for Sam & Dave's Hold On, I'm Comin' album). Initially, the album cover was to be shots of the band taken in front of the Fillmore East with their names on the marquee above them, but no one was satisfied with the results. The band's main purpose for the cover was that it be as "meat and potatoes" as the band's ethos and performing, and someone suggested the band make it a photograph of the band in an alley waiting with their gear to go onstage.  The image was shot by photographer Jim Marshall one morning in the band's home of Macon, Georgia. The group were not very happy about being woken up early to shoot ("we figured it didn't make a damn bit of difference what the cover was or what time we took it," said guitarist Dickey Betts). Normally the band hated being photographed; the cover of later retrospective release The Fillmore Concerts shows them displaying terminal boredom. However, during the session, Duane spotted a dealer friend, raced over and grabbed a bag of contraband, then returned to his seat, discreetly clutching the stash in his lap. This made the whole band laugh, resulting in a memorable image. Marshall stenciled the album title on one of the road cases, which were stacked in front of the wall.  The back cover shows their road crew gathered in the same spot with 16 oz cans of Pabst Blue Ribbon beer provided by the photographer as a reward to the roadies for lugging out and stacking the band's heavy equipment for the shoot. Among the crew on the back cover are Joseph "Red Dog" Campbell, Kim Payne, Mike Callahan, Joe Dan Petty and Willie Perkins (the last two the newest additions to the crew at the time). The idea to have the crew on the back cover was Duane Allman's idea, as all involved viewed them the "unsung heroes" in the operation. A photo of Lyndon, then in jail awaiting his trial, was superimposed to the wall behind the crew.

What did the artwork consist of?
band devised the cover idea for At Fillmore East rather than leaving it in the hands of Atlantic executives (Allman was particularly disgusted with the artwork for