Editing Philadelphia Main Line (section)

===21st century===
[[File:MilePostRadnor.JPG|thumb|A mile post on [[U.S. Route 30 in Pennsylvania|U.S. Route 30]] in front of Anthony Wayne Theater with AT&T tower in background]]
Today, the Main Line is another name for the western suburbs of Philadelphia along [[U.S. Route 30 in Pennsylvania|Lancaster Avenue (U.S. Route 30)]] and the former main line of the Pennsylvania Railroad and extending from the city limits to, traditionally, Bryn Mawr and ultimately [[Paoli, Pennsylvania|Paoli]],<ref>[http://www.trainweb.org/phillynrhs/prr.html Philly NRHS – PRR History]</ref> an area of about {{convert|200|sqmi|km2}}. The upper- and upper middle-class enclave has historically been one of the bastions of "[[old money]]" in the Northeast, along with places like Long Island's [[North Shore (Long Island)|North Shore]] (AKA: "Gold Coast"); [[Westchester County, New York]]; [[Middlesex County, Massachusetts]]; and [[Fairfield County, Connecticut]].

Neighborhoods along the Main Line include nineteenth and early twentieth-century [[Streetcar suburb#Railroad suburbs|railroad suburbs]] and post-war subdivisions, as well as a few surviving buildings from before the suburban development era. The area today is known primarily for several educational institutions as well as robust suburban life.<ref>{{cite web| url = https://www.nationalgeographic.com/travel/intelligent-travel/2013/06/10/beyond-philly-the-main-line-afitz/| archive-url = https://web.archive.org/web/20190118144616/https://www.nationalgeographic.com/travel/intelligent-travel/2013/06/10/beyond-philly-the-main-line-afitz/| url-status = dead| archive-date = January 18, 2019| title = Beyond Philly: The Main Line| website = [[National Geographic Society]]| date = 10 June 2013}}</ref>