An entire wall of glass block admitted light while maintaining privacy.

During the 1964 modernization, the original windows were replaced by glass block.

The major change to the building since construction has been the replacement of the original wood windows with glass blocks.

The south side windows have been replaced by glass blocks while the original double board door remains in the center.

Normally towers are not loved because they shut down at 6pm and you have a black glass block.

The glass block had not floated out of place.

The large bar, from the late 1940's, is an island built on a glowing base of glass blocks.

Walls are not the only things made with glass blocks.

A glass block had fallen from the 90-meter level.

What did it weigh, this 1200-plus-meters-high structure of glass blocks?