They might sponsor an explorer for several reasons - and usually did so for a combination of several of these reasons:
A czar (tsar or tzar) was the ruler of old Russia.
tetrarch
England
An empire is a country, state, or region. An emperor is the ruler over the empire.
Great Britain
zheng he
conqulstador
The Incan ruler was killed and the Incan civilization eventually disappeared.
An absolute ruler is a ruler that has unlimited power over their country.
Autocracy
Catherine the Great was the ruler of Russia.
A country whose ruler has unlimited power is called an autocracy.
A czar (tsar or tzar) was the ruler of old Russia.
+yes there is a long time ago she was the ruler of England when the explorers in the United States of America
EGYPT!
france
The ruler of a country is typically referred to as the head of state or the monarch in a monarchy.