After founding his first stores elsewhere, Jefferson County’s Frank Winfield Woolworth bought the building in Watertown where he got his start in the dry goods business, intending to raze it and build one of his own stores. Woolworth died before he could see it, but his company realized his plan and the building’s a central part of the early history of the five-and-dime chain. After years of vacancy, two developers have plans to revive the landmark.