Small South Philly bank taking big step - for it - to downtown. (Pennsylvania Savings Bank)

While vowing not to forget its 108-year-old Italian roots, Pennsylvania Savings Bank is moving its corporate headquarters Monday from South Philadelphia to the heart of Center City's financial district, where lawyers and accountants far outnumber those with family recipes for sauce and cannoli.

The new main office for the thrift, started by Joseph Fume, the grandfather of state Sen. Vincent J. Fumo, will be on the 26th floor of 11 Penn Center, at the northeast corner of 19th and Market streets. On the street below, PSB opens its sixth branch today, its first in Center City. The 4,200-square-foot branch was most recently operated by CoreStates Bank NA. PSB has been based at 12th Street and Tasker Avenue, not far from the Fume living room at 13th and Passyunk where the thrift used to do business.

"We have been a neighborhood …