sentences:  In the early 1990s, over 100 buildings in Courtland were listed on the National Register of Historic Places as the Courtland Historic District.Most of the buildings in the district date from the 1830s through the 1930s, and architectural styles include Federal, Italianate, Victorian, Colonial Revival, and Neoclassical.The Town Square was part of the town's original 1818-1819 plan.