Henry Bessemer was an English engineer and inventor, best known for developing the Bessemer process, a method for mass-producing steel from molten pig iron. This innovative technique, introduced in the 1850s, significantly reduced the cost and time required to produce steel, which was essential for the Industrial Revolution. Bessemer's contributions to metallurgy transformed construction and manufacturing, enabling the creation of stronger and more durable materials. His work laid the foundation for modern steel production and influenced various industries, including railroads, bridges, and buildings, making him a pivotal figure in engineering history.