What is the name of the modern state, formerly called Persia?

The modern name of Persia is Iran.
The state received its name in 1935. In fairness, it should be noted that modern Iran is only approximately located on the territory of ancient Persia. In ancient times, Persia was a huge empire, its territory stretched from Egypt to India and did not have clear boundaries. At one time, most of the world known at that time was considered the lands of the empire, but there were also periods when the territory of Persia was fragmented – divided between various rulers who were at enmity with each other.