Two blocks of commercial buildings along South Main Street (Idaho State Highway 8) in downtown Troy, Idaho, United States, are listed on the US National Register of Historic Places as the Troy Downtown Historic District. Shown here are (left to right): *Rietmann Hotel, 1898, 525–529 South Main Street *Olson Johnson Co. (noncontributing), "ca." 1905, 521–523 South Main Street *Olson Johnson Co. (Troy City Hall), "ca." 1905, 519 South Main Street *Smoke House, 1905, 517 South Main Street *Troy Post Office (former), 1913, 513–515 South Main Street *Johnson's Drug, 1916, 511 South Main Street *Olson Johnson Co., 1916, 507–509 South Main Street *Olson Johnson Co., 1912, 505 South Main Street