Observation dome for buildings
Observation shelter
Openable and closeable roof construction
Openable and closeable roof construction
Openable canopy housing
Openable dome-shaped roof structure
Openable dome-shaped roof structure
Openable dome-shaped roof structure
Openable hatch apparatus for a skylight
Openable roof
Openable roof
Openable roof apparatus
Openable roof apparatus
Operable wall
Operable wall system
Operating-vent glass-glazed standing-seam skylight
Orientable architectural structure