Villages are small human settlements located in rural areas that are typically engaged in agriculture. They are generally smaller than towns and do not have regular markets, town halls, or mayors. Villages can take different forms, such as deserted medieval villages, pit villages located around coal mines, or hamlets that do not have their own churches. In the United States, villages are incorporated municipalities within towns or townships that have less authority than cities. They can be statutory villages governed by state laws or charter villages that write their own governing charters. In Russia, villages concentrate the rural population and can be selos with churches, derevnyas without churches, or dacha settlements used mostly for seasonal residence.