Diamond Silk Mill

{{short description|Historic mill in York County, Pennsylvania, U.S.}}

{{Use mdy dates|date=March 2025}}

{{Infobox NRHP

| name = Diamond Silk Mill

| nrhp_type =

| image = Diamond Silk Mill YorkCo PA.JPG

| caption = View from Hay Street

| location = Junction of Ridge Avenue and Hay Street in East York, Springettsbury Township, Pennsylvania

| coordinates = {{coord|39|58|35|N|76|42|0|W|display=inline,title}}

| locmapin = Pennsylvania#USA

| built = 1900

| architect = Dempwolf, John A.

| architecture = Romanesque

| added = July 24, 1992

| area = {{convert|9|acre}}

| refnum = 92000949{{NRISref|version=2010a}}

}}

Diamond Silk Mill, also known as York Silk Manufacturing Company, is a historic silk mill located at Springettsbury Township, York County, Pennsylvania. It was designed by architect John A. Dempwolf and built about 1900. The mill is a 3 1/2-story, brick building with heavy timber frame trussing on a stone foundation, and measures 50 feet by 300 feet. It has a hipped roof, and features an octagonal 100-foot high smokestack and decorative corbelled brick cornice in the Romanesque Revival style.{{cite web| url = https://www.dot7.state.pa.us/ce/SelectWelcome.asp| title = National Historic Landmarks & National Register of Historic Places in Pennsylvania| publisher = CRGIS: Cultural Resources Geographic Information System| format = Searchable database| access-date = 2011-12-20| archive-date = 2007-07-21| archive-url = https://web.archive.org/web/20070721014609/https://www.dot7.state.pa.us/ce/SelectWelcome.asp| url-status = dead}} Note: This includes {{cite web | url = {{NRHP-PA|H096463_01H.pdf}} | title = National Register of Historic Places Inventory Nomination Form: Diamond Silk Mill | access-date = December 18, 2011 | author = John J. Calabrese | format = PDF | date = February 1992 }}

In 1910, the mill's business had increased such that it was noted by an industry periodical as becoming a full-time operation and hiring additional workers.{{cite news |url=https://www.cs.arizona.edu/patterns/weaving/periodicals/ptj_07_04_3.pdf |newspaper=Posselt's Textile Journal |title=Mill News |page=xi |location=Philadelphia |date=October 1910 |access-date=December 2, 2015 |publisher=University of Arizona |quote=The Diamond Silk Mill, which has been operating on short time basis,{{sic}} is now running full time. Sufficient orders has {{sic}} been received, which will necessitate the employment of additional hands. }} Silk manufacturing would become one of York's most important industries, feeding Lancaster's manufacture of umbrellas. A decline began with the Great Depression and continued with the introduction of synthetic fibers in the late 1930s, for which most York mills did not have equipment.

The mill was added to the National Register of Historic Places in 1992.

File:Diamond Silk Mill rear YorkCo PA.JPG|Interior court