History of Europe

What parts of Europe still had slavery when Christopher Columbus started the slave trade to Americas?

Christopher Columbus did not start the slave trade to the Americas. The transatlantic slave trade was already well underway by the time Columbus made his first voyage in 1492. The Portuguese had been trading slaves from West Africa to Europe since the 15th century, and the Spanish had begun to do the same by the end of the 15th century.

When Columbus arrived in the Americas, the indigenous people were already enslaved by the Spanish and Portuguese colonists. The Spanish and Portuguese also began to import African slaves to the Americas to work on plantations and other labor-intensive industries.

So, there were no parts of Europe that still had slavery when Columbus started the slave trade to the Americas, because the slave trade to the Americas had already begun before Columbus's arrival.