Fyodor Ivanovich Tyutchev (Russian: Фёдор Иванович Тютчев, Pre-Reform orthography: Ѳедоръ Ивановичъ Тютчевъ; December 5 [O.S. November 23] 1803 – July 27 [O.S. July 15] 1873) was a Russian poet and diplomat.