PHOTOS: Democratic, GOP conventions in Philadelphia

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Thursday, February 12, 2015
President Harry S. Truman is shown during his acceptance speech at the Democratic National Convention in Philadelphia, July 15, 1948.
Members of the Mississippi walkout delegation gather under state banners outside Convention Hall after bolting Democratic National Convention in Philadelphia, July 14, 1948.
The main floor of Convention Hall fills up at the midway point during the opening session of the 1948 Democratic National Convention in Philadelphia, Pennsylvania, July 12, 1948.
This was the scene at the Democratic National Convention in Philadelphia, Pa., as the few delegates and spectators present listen to speeches, July 13, 1948.
Alabama delegates to the Democratic National Convention wave and shout in Philadelphia, July 14, 1948 as they seek recognition from the chairman.
Delegates, yelling and cheering, hold their state banners high as they pass the speaker's rostrum during a tumultuous demonstration for Senator Alben W. Barkley of Kentucky.
PHOTOS: Democratic, GOP conventions in PhiladelphiaPresident Harry S. Truman is shown during his acceptance speech at the Democratic National Convention in Philadelphia, July 15, 1948.
AP Photo

PHILADELPHIA (WPVI) -- Philadelphia has hosted both the Democratic and Republican National Conventions in the past.