English: As seen in September 2021: one of the oldest extant buildings in Warren, and a contributing property to the NRHP-listed Warren Historic District, is the two-story stone building at 215 4th Avenue. Though it was very popular at the time in other areas of the state, the vernacular Federal style utilized in its design is an architectural anomaly in Warren's early history, when the predominant aesthetic was the Greek Revivalism imported by settlers and migrants from New York and New England. This is owed to the fact that the mountainous topography of the region and the southward flow of the Allegheny River makes access to Warren from the south (i.e. from elsewhere in Pennsylvania) much more difficult than from the north, meaning that most of those who found their way into the valley came from those regions. With a façade of finished stone contrasting with rough-cut stone on the side elevations, all the style's distinguishing characteristics are on full display here: a symmetrical façade five bays wide with a main entrance and truncated Palladian window both centrally located thereon, a shallow-pitched side-gabled roof pierced by halfmoon-shaped dormers and flanked by twin chimneys. Built in 1833 by pioneer settler Ebenezer Jackson as a tavern and hotel serving locals doing business in Warren as well as travellers headed west to Ohio, the building was used by a chain of subsequent owners for similar functions throughout the first part of its history (save for two years in the mid-1830s when it served as home of the Lumbermen's Bank). It's now an apartment building known as the New Mansion House.