This cat is sleeping peacefully grabbing two stools!
This cat is smart. She knows two seats are better than one.
Cats love safe secure places to sleep, and this one looks like the safest space she could get. Some cats simply find corners and enclosed spaces comfortable. The feeling of being surrounded or having something against their body can be soothing and help them relax.
This spot, under a table and on chairs is also a space where the sleeping cat can be less visible to potential enemies. She is sleeping safely in a secure space and probably having great dreams.