I love the symmetry of paired mirrors, and I also love the look of mirrors leaned against the wall. It creates a long, vertical look that opens up the space. Plus, gazing into a mirror set at an angle is so flattering (dressing room designers: take note)!
The entry or foyer of any home is a great space to use tile floor like here in this traditional interior. The natural stone set at a diagonal pattern helps expand the visual appearance of a the room.