The Puritan settlers initially named the peninsula that would later become the heart of Boston as "Trimountaine," the name was derived from a set of three prominent hills on the peninsula, two of which were leveled as the city was modernized. The middle one, Beacon Hill, shortened between 1807 and 1824, remains to this day as a prominent feature of the Boston cityscape. Tremont Street still carries an alternative form of the original name. The two smaller peaks were Cotton Hill (named after John Cotton, but later Pemberton Hill, at what is now Pemberton Square) and Mt. Whoredom (or Mt. Vernon, formerly at the location of the modern-day Louisburg Square).