Sally port
A sally port or postern is a small Nebentor in a fortification, which a surprising failure or an undiscovered leaving the plant allowed the occupation of the plant in a siege, partly in peacetime an abbreviation otherwise long way through the fortifications.
Naming
For the castle researcher Otto Piper is in the " hal türlîn " (secret little door ) that is mentioned in Gottfried of Strasbourg's verse romance Tristan ( verse 9328 ) to a side door; In French the term was with " poterne, fausse poterne or fausse porte " equate. But Piper separates conceptually not clear between wicket door and postern, because he doubts that a secret exit was often used for a failure, because the garrison was numerically too small for a battle. A possible spatially and temporally very limited failure, for example, to destroy a siege engine, it does not take into consideration small side exits.
Method of construction
The gate is relatively small, often designed in comparison to the main entrance ( Peace Gate ) input only for pedestrians. A " often applied to a hidden and from the outside [sic ] not easily accessible location " sally port is usually designed as a simple door that opens inwards and can be boarded under siege from the inside. Other doors were failure (for example, through a gate ) so as not to be a weak point in the attachment well secured yourself. Behind the gate leads a walk through wall or wall. Partial failure doors are provided with a second door on the inside of the mounting (similar to a safety lock). Behind it are often failure courtyards where troops can be collected before the failure. To arterial roads can connect to the outside of the fixture.
Examples
- Sally (Königsberg )
- Mill Gate ( Bautzen )