Description: In 1943 the Germans started to build a big bunker for the Luftwaffe at the Bornia Estate. The bunker got the codename Cäsar and type number L 487B. Early 1944 this bunker was completed, but because of a reorganisation within the Luftwaffe, the bunker was never put into use by the Germans.
Only when the war was finished, the bunker was put into use by the Dutch Royal Air Force. However, it got the function for which it was built: Sector Operations Centre (SOC). As camouflage the Germans had painted windows and a balcony on the four meters thick concrete walls. The Dutch did it better: They just covered the concrete walls with a brick wall in which real windows were included (you can see the concrete of the real bunker through the windows).