Come celebrate the 40^th anniversary of Lowell National Historical Park with this slide show of the City’s architectural past, present, and future.  Aucella has led the park’s historic preservation and development division for many years and will share “before and after” images of early building projects from the 1970s to 1990s.  Stowell, administrator for the City’s historic board, will focus on particularly challenging buildings.  Tonetti is the park’s architect and will highlight current and future building preservation projects in Lowell.