Editing East Berlin, Pennsylvania (section)

===20th Century===
In 1921, power lines were constructed in East Berlin, as well as neighboring [[Abbottstown, Pennsylvania|Abbottstown]]. 1933 marked the first year that natural gas piping was operational in the town. In the 1950s, the East Berlin Municipal Authority was created, which began to construct a sewage and water treatment facility. Despite some cave-ins during construction of the lines, no major injuries were sustained during its difficult construction, and the project was completed in February 1957.<ref name="The Wheels of Time II: East Berlin Sestercentennial" />

American diplomat [[George F. Kennan]] bought a farm in East Berlin in 1942. Following his work in President Harry S. Truman’s administration, he used it as a secondary home while he worked at the [[Institute for Advanced Study]] in [[Princeton, New Jersey]]. He owned it until his death in 2005.<ref name="The Wheels of Time II: East Berlin Sestercentennial" /> In 1967, Kennan had his daughter Grace house [[Svetlana Stalin|Svetlana Stalina]], the daughter of [[Joseph Stalin]], in their home in East Berlin following her defection to the United States, where she stayed for the summer; Grace admits that the people of East Berlin did not "know they had a mysterious visitor in their midst."<ref>{{cite web |last=Kennan Warnecke |first=Grace |date=April 29, 2018 |title=My Secret Summer with Stalin's Daughter |url=https://www.politico.com/magazine/story/2018/04/29/svetlana-stalin-russia-grace-kennan-warnecke-218110 |url-status=live |archive-url=https://web.archive.org/web/20221205162835/https://www.politico.com/magazine/story/2018/04/29/svetlana-stalin-russia-grace-kennan-warnecke-218110/ |archive-date=Dec 5, 2022 |website=[[Politico]]}}</ref>

The [[East Berlin Historic District]] was added to the [[National Register of Historic Places]] in 1985.<ref name="nris">{{NRISref|version=2010a|name=East Berlin Historic District|refnum=85002693}}</ref>