Same places they sleep today. If they are wild they would find a cave, hole, or spot to sleep and if they were domesticated they were usually in barns, stalls, some were kept with the owners sleeping in the same location.
They Mostly Sleep
Winter sleep is called hibernation. Hibernation is when animals (such as bears) sleep for multiple months in order to conserve energy during the winter.
A long deep sleep done by animals during winter
hibernation
Some animals sleep through the winter -- those animals are called hibernators. The long sleep through the winter is called hibernation.
Under trees, in deadfalls, in shady spots that willows provide, etc.
they sleep but they do not hibernate
This is called hibernation.
Some turtles do and some turtles don't cause during winter it's hard to find food for certain animals liek turtles
They are never awake or asleep in the same way as animals. Many trees become dormant during winter.
Some animals such as bears go into a state of dormancy called hibernation during the winter. They reduce their metabolic rate and conserve energy by sleeping for extended periods. Hibernation helps these animals survive the cold and scarce food resources during the winter months.
bears sleep a lot during the winter but they do not truly hibernate . They sleep undisturbed for long hours. Thier long sleeping pattern is called denning