What was the name of the line that divided the New World and a half giving the west of Spain in the east to Portugal?

The line that divided the New World between Spain and Portugal was called the Treaty of Tordesillas. Established in 1494, it granted Spain the lands to the west of the line and Portugal the lands to the east. This division was intended to resolve disputes over newly discovered territories following Christopher Columbus's voyages. The line was later adjusted, but it initially set the stage for colonial expansion by both nations.