On this date the cornerstone for San Francisco's spectacular Palace of the Legion of Honor Museum was levered into place.

The Museum was to be a vehicle for the cultural pretensions of the notorious Alma Spreckels. This social-climbing dynamo envisioned her Museum as a far western outpost of French art and culture. Drawing on the vast fortune of her husband -- sugar baron Adolph Spreckels -- she constructed a replica of the Palace of Versailles out at Lands End. Alma would stock the place with art treasures from her own vast collection -- including one of the finest assemblages of Rodin sculpture on the planet.

I've already talked myself hoarse on the subject of Alma Spreckels' rags-to-riches clamber up the social slopes of Pacific Heights, but what's really interesting me today is not what's inside her museum, but what lay underneath that cornerstone in 1921. read on ...