timetravelteam:

This is the menacing FlaKturm VII G-Tower (FlaKtower). Built in 1942 it was armed with 8 AA 128mm Guns 32 20mm AA guns.
These bunkers were virtually 20th century citadels where up to 20,000  people could seek shelter during bombings.
Flakturm VII G-Tower Augarten, Vienna

timetravelteam:

This is the menacing FlaKturm VII G-Tower (FlaKtower). Built in 1942 it was armed with 8 AA 128mm Guns 32 20mm AA guns.

These bunkers were virtually 20th century citadels where up to 20,000  people could seek shelter during bombings.

Flakturm VII G-Tower Augarten, Vienna