Editing Greencastle, Pennsylvania (section)

===Modern era===
Following the war, Greencastle grew considerably in the late 19th century during the [[Industrial Revolution]], having several industrial factories built inside the town limits, including the Crowell Manufacturing Company, which constructed farming equipment.

In 1902, Greencastle businessman Philip Baer began a tradition where the town holds a triennial social event known as "[[Old Home Week]]". Every three years, Greencastle townspeople and former residents come together for one week in August in a town-wide reunion to reminisce and fellowship. Baer performed prolifically in a [[minstrel show]] which included the use of [[blackface]]. As recently as 2013, the program has featured a "modern minstrel."<ref>https://www.therecordherald.com/story/news/local/2013/08/12/another-old-home-week-celebration/44358104007/</ref> The most recent Old Home Week Celebration occurred in 2022; the next one will be in 2025.<ref>All historical information drawn from one source -''Conococheague: A History of the Greencastle-Antrim Community 1736-1971'' by William Conrad.</ref>

The [[Greencastle Historic District]], [[Mitchell-Shook House]], and [[Martin's Mill Covered Bridge (Antrim Township, Pennsylvania)|Martin's Mill Bridge]] are listed on the [[National Register of Historic Places]].<ref name="nris">{{NRISref|version=2010a}}</ref>

Greencastle contains many Christian church congregations with longstanding heritage and rich history. The present-day [[Methodist]] church has origins dating back to 1805 when [[Christian Newcomer]] conducted services in the area.