Who built and flew the first four-engine aircraft?

Igor Sikorsky is recognized for building and flying the first four-engine aircraft, known as the Sikorsky Ilya Muromets. This aircraft made its maiden flight in 1913 and was significant not only because of its four engines but also due to its design and capacity. The Ilya Muromets was ahead of its time, showcasing advanced features such as a spacious cabin for passengers and dedicated space for cargo, which contributed to the evolution of larger aircraft in aviation history.

Sikorsky's innovations laid the groundwork for modern multi-engine aircraft design, influencing future developments in both commercial and military aviation. His contributions to aviation extended beyond fixed-wing aircraft, as he is also renowned for his development of helicopters, which further cemented his legacy in aerospace engineering.