Fortress design - Anwerp

Post 1906 Construction

A fort is a small fortified position with small garrison. A wide ditch filled with water circulates the fort. The ditch is defended by Artillery located in 'caponiers'. These are small casemates located near the ditch. Every corner of the defense is called a Saillant. They are numbered 1 to 4. The line between two Saillants is called a Front.

Picture map Koningshooikt


The post 1906 fortresses are called 'Unit Forts'. These forts have three functions, ie.

  1. Long range artillery for attacking enemy positions
  2. Close range artillery to defend the ditch and close environment
  3. Artillery support between the area of two forts.

The forts are build in two sizes, which we call class I and class II forts. They differ is size and armament.

A Class I fort has :

A Class II fort has :

The protection of the Ditch and fronts is achieved with 5.7 cm guns located under cupolas or in casemats. Four types of designs were build, A, B, C and D.


Type A

Type A is used in Brasschaat and Kessel. Two cupolas could fire into the ditch. The floor plan shows a 1st class fort.

Picture Type A


Type B

Type B is found in Broechem, Liezele, Haasdonk, Breendonk, Ertbrand, Oelegem and Koningshooikt. Five guns are installed on each of theh caponier extensions. The floor plan shows a 1st t class fort.

Picture map Type B



Type C

Type C has a seperated caponier with two cupolas. These could fire into the ditch. This construction can be found on some older forts and on the fort of St-Gravenwezel. The floor plan shows a 2nd class fort.

Picture map Koningshooikt


Type D

This fort follows a floor plan which is very unique and only used for Fort Bornem. It is asymmetrical and has one 15 cm, one 12cm , two 12 cm howitzers and four 7.5 cm cupolas. The ditch defense is done by using six 5,7 cm cupolas.

Picture map Koningshooikt

Overview of post 1906 build fortresss with size and type :

LocationClass Design
Bornem2D
Liezele 2B
Breendonk2B
Konigshooikt 1B
Kessel2C
Broechem2B
Oelegem1B
St Gravenwezel1 A
Brasschaat2C
Ertbrand2B
Haasdonk2B




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