fiefdom

The estate controlled by a feudal lord.

The duke's fiefdom had been greatly expanded as a reward for his dutiful military service on behalf of the king.

"If you wish to offer any of my vassals fiefdoms or positions in your new kingdom, they have my leave to accept. I promised them that when they came with me."

Any organization in the control of a dominant individual.

“[Bill Clinton] was just walking around, looking in all the offices, like he was surveying his fiefdom. He had a big grin on his face.”

Hollande told cheering supporters in his rural fiefdom of Corrèze in south-west France that he was best-placed to lead France towards change, saying the vote marked a "rejection" of Sarkozy and a "sanction" against his five years in office.