Russian design studio, Mojorno, has created Catissa, a house for cats with four stories. The dwelling is designed to be mounted to a wall, leaving more floor space for you while your feline friends explore their new estate, out of reach from anyone but themselves. A small ladder leading up to the home can also be installed on the wall to aid in access, while the house comes with removable soft pillows—a bonus that will guarantee a non-grumpy cat.

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[via Designboom]