The Nassau County Jail, built in 1900, was constructed to serve as a detention facility for individuals awaiting trial or serving short sentences in Nassau County, Florida. The jail was part of the county's efforts to establish a more organized and secure system for handling criminal justice matters at the turn of the 20th century. It was designed to accommodate the growing population and the corresponding increase in legal and criminal cases in the area. The facility was intended to ensure the safety of the community by securely housing individuals accused or convicted of crimes.