From the record
“Walnut Green School, also known as District School Number 25, is a historic one-room school building located at Greenville, New Castle County, Delaware. It was founded in 1808 and in 1924 was said to be the oldest schoolhouse in the state.”
Wikipedia article Walnut Green School, CC BY-SA 4.0.
One of 411 National Register listings published here for New Castle County · listed in 1994 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service



