10 December 1913

The Ilya Muromets aircraft, designed by Igor I. Sikorsky and built at the Russo-Baltic Carriage Factory (RBVZ) in Riga, first flew on 10 December 1913. The revolutionary design, intended for commercial passenger service, had a spacious passenger saloon and washroom on board. During World War I, it became the first four-engined bomber to equip a dedicated strategic bombing unit.