Professor Paul Pratchenko has lent his artistic talents to a good cause: the Hearts in San Francisco project. His "Heart x Three" is among the 130 heart sculptures which have been on display along city streets and at various parks and plazas since February. At the end of the year the sculptures will be sold at an auction to raise a projected $1 million for the San Francisco General Hospital Foundation, specifically to improve patient care and comfort at the San Francisco General Medical Center. Rotated from place to place, the hearts will be on display through October. Pratchenko's heart, which draws on the symbolism of the number three and features intertwining Celtic knots, was last spotted on Stockton Street.

Photo: Courtesy of Hearts in San Francisco