Why should you vis­it this small pri­vate square fenced in by wrought iron? Well, its gor­geous­ly pre­served fed­er­al­ist archi­tec­ture is unique to the coun­try for one. These mag­nif­i­cent town­hous­es rarely trade hands, but when they do they com­mand upwards of $11 mil­lion dol­lars! Famous res­i­dents include, archi­tect Charles Bulfinch, painter John Sin­gle­ton Cop­ley, and author Louisa May Alcott. Today, Sec­re­tary of State John Ker­ry is a con­tem­po­rary res­i­dent of the square. See if you can spot the Secret Ser­vice agents as you walk past.