Ключевые слова: 17th century, 18th century, 19th century, along, america, american, building, buildings, city, cityscape, cobble stone, cobblestone, cobblestone street, downtown, downtown philadelphia, era, exterior, famous, famous place, government, historic, history, home, homes, in row, independence, landmark, old, old city, pennsylvania, people, philadelphia, philadelphia pennsylvania, philly, revolution, revolutionary, row homes, sightseeing, square, street, tourist, travel, travel destination, trees, united states, usa, vacation destination,