Cyfnod
20th century
8,676
1945-
2,916
1900-1999
2,563
1900 - 1999
2,562
19th century
1,844
Since 1945
1,352
18th century
893
1945-1989
544
1800-1899
501
1960-
443
21st century
390
1975-
374
1989-
364
1976-
351
1918-
346
20e siècle
336
1991-
317
1800 - 1899
300
1918-1945
292
Early works to 1800
250
1990-
243
1949-
220
Civil War, 1642-1649
219
1979-
216
1702-1714
211
1980-
206
1700-1799
194
1700 - 1799
183
1948-
178
Since 1960
174
1947-
167
1970-
167
1800-1999
166
1939 - 1945
163
Since 1918
159
1912-1949
158
1642 - 1649
156
Civil War, 1861-1865
151
Revolution, 1789-1799
150
17th century
142
Since 1991
135
1900-2099
133
1971-
131
Since 1975
131
1939-1945
129
1974-
129
Since 1976
129
1971-1990
125
20e siècle
125
1981-
124
rhagor ...