Karl Ivanovich Rossi was a prominent Russian architect and sculptor, born in 1775 in Italy. He is best known for his work in St. Petersburg, where he contributed to the city's neoclassical architecture. Rossi's designs often featured grand public buildings and elegant squares, reflecting the artistic trends of his time. One of his most notable achievements is the Mikhailovsky Theatre, which showcases his ability to blend functionality with aesthetic appeal. Rossi also played a significant role in the development of the Senate Square and the New Michael Palace, leaving a lasting impact on Russian architecture and urban planning.