Alexander Calder was an American artist known for his innovative sculptures and mobiles. Born in 1898, he combined art and engineering to create moving pieces that captivated audiences. His work often featured bright colors and playful shapes, making his art feel alive and dynamic. Calder's most famous creations are his mobiles, which are suspended sculptures that move with air currents. He also made large-scale public installations, like the Stabiles, which are stationary sculptures. Calder's unique approach to art has influenced many artists and continues to inspire creativity in the world of modern art.