[1] The term pomeshchik is commonly translated in English as "landlord".
In pomestye system [ru], a sovereign (tsar or knyaz) could grant a piece of state-owned land to a person for his service (usually military) into personal ownership, for the term of the service or for life.
[1] Its temporary and conditional character constituted the differencer from the votchina system, whereby land ownership was hereditary.
This was finalized by Peter the Great in his 1714 Decree on Single Inheritance [ru], whose main rule of law was inheritance of the real estate regardless its type by a single son, hence the name.
The "single inheritance" clause was amended in 1730 by Empress Anna of Russia, and the only consequence of Peter's decree left was unification of pomestye and votchina types of ownership.