Which two countries gained territories as a result of the Treaty of Paris 1763?

The two countries that gained territories as a result of the Treaty of Paris in 1763 were Great Britain and Spain.

1. Great Britain: The Treaty of Paris ended the Seven Years' War, also known as the French and Indian War in the American colonies. As a result of the treaty, Great Britain gained significant territories. They received all French territory east of the Mississippi River, as well as Spanish Florida.

2. Spain: Although Spain had to cede Florida to Great Britain, they received the Louisiana territory west of the Mississippi River from France as compensation. This was a secret agreement known as the Treaty of Fontainebleau (1762) which was later revealed after the Treaty of Paris.

So, in conclusion, the Treaty of Paris in 1763 resulted in territorial gains for both Great Britain and Spain.