From the record
“The Arnold-Simonton House is a historic house in Montgomery, Texas, United States. Built in 1845 by Epaphras Joseph Arnold, it is the oldest house in Montgomery.”
Wikipedia article Arnold-Simonton House, CC BY-SA 4.0.
One of 2 National Register listings published here for Montgomery County · category: Building · built in 1845, Greek Revival architecture.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service