What happened in Fibonacci's life?

Fibonacci, also known as Leonardo of Pisa, was an Italian mathematician born around 1170. He is best known for introducing the Hindu-Arabic numeral system to Europe through his book "Liber Abaci," published in 1202. This work also contained the famous Fibonacci sequence, which describes a series of numbers where each number is the sum of the two preceding ones. His contributions significantly influenced mathematics and commerce in the Western world.