A fortified gateway, sometimes a gate castle (German: Torburg), is a heavily fortified gateway of a castle or a city wall. Castle gateways of this type usually have additional fortifications in front of them. A common form is the tower gateway (Turmtorburg); a variant is the bastion gateway (Halbrundturmtorburg). They are common in Europe.
Fortified gate in the Limerick coat of arms
Fortified gate in the Dinslaken coat of arms
Fortified gate in the Königswinter coat of arms
Fortified gate in the Wiehl coat of arms