This Moscow apartment is located on the 5th floor of a tall multi-story building with a courtyard that has been renovated in an unusual way. The Russian architect Peter Kostelov decided on the highest level of environmental friendliness and created an oak capsule in it. Oak boards cover the ceiling, floor and walls, forming shelves and a desk. Each room plays with contrast: white oak covers all surfaces and dark leather furniture, and the outer parts of the capsule are made of composite stone. Smooth and rounded passages between walls, ceiling and floor connect and visually expand the small space between the walls in the living room. The style of the rest of the apartment was determined by this oak zone: the style is minimalist and environmentally friendly, there are no disturbing details and the eye enjoys the ecologically clean surfaces made of white oak.