|
T |
towers and tower houses
(mainly around 1540-1680)
|
K |
simple keeps
(14th and early 15th century)
|
|
KK |
developed keeps including chambers and courtyards
(from around 1400-1540)
|
E |
E-plan tower houses featuring more than one wing
(16th and 17th centuries)
|
|
L |
L-plan tower houses featuring a main block and one wing
(16th and 17th centuries)
|
Z |
Z-plan tower houses featuring 2 corner towers situated obliquely opposite each other
(16th and 17th centuries)
|
|
O |
walled enclosures
(mainly 12th and 13th century)
|
C |
reasonably important castles built around a central courtyard
|
|
h |
18th century tower houses
|
V |
castles of unusual plan
|
|
m |
much modified or modernised castellated structures
|
