FLYINGBUTRESSES
SEMICIRCULAR
BARRELVAULT
CATHEDRAL
HORSESHOE
COLUMNS
NICHE
TOWER
O
W
F
O
Q
E
T
W
I
X
G
V
X
E
J
A
A
H
A
Z
A
S
X
N
I
S
T
F
L
C
U
A
P
D
O
S
E
M
I
C
I
R
C
U
L
A
R
A
L
O
E
R
E
R
Y
I
E
X
T
W
E
Y
S
C
G
E
U
U
S
U
Z
G
O
U
O
P
E
P
I
T
B
E
F
F
T
E
I
O
E
Y
N
R
E
T
M
N
E
O
H
T
N
T
S
I
D
U
X
E
B
O
U
S
G
A
H
C
M
F
L
H
A
O
U
V
O
I
N
O
B
B
I
I
I
G
K
U
O
D
U
Z
X
I
I
A
X
I
U
U
O
N
P
I
A
E
I
V
P
Q
H
C
T
V
Z
T
L
K
N
O
N
V
A
K
I
I
O
Z
N
H
P
K
R
I
A
P
X
A
L
K
E
O
G
J
R
J
A
Z
R
E
W
O
T
J
L
E
M
R
I
O
I
O
E
M
W
A
S
V
Z
J
K
I
R
G
W
D
U
X
S
P
J
N
O
S
R
T
X
O
R
R
X
U
E
A
M
O
Z
G
W
Z
E
L
N
E
Q
K
A
R
G
A
F
C
O
L
U
M
N
S
I
O
C
E
U
B
M
O
N
G
U
L
A
R
D
E
H
T
A
C
Z
X
G
