Blue tower
Blue tower denotes:
- Blue Tower (Königsberg) , built in 1378 as part of the walling of the city ordered by Winrich von Kniprode , demolished in 1735
- Blauer Turm (Copenhagen) , a former castle and prison tower
- Blauer Turm (Lübeck) , a former city fortification tower
- Blauer Turm (Herten) , a gas generation project
- Blue tower in Bad Wimpfen , a keep of the city
- Blue tower near Thüngen, see Thüngen #Bauwerke , a former tower used to monitor shipping
