（古河城跡）

（古河城跡 曲輪土塁）

ADEAC: A System of Digitalization and Exhibition for Archive Collections

古城城跡

三重県環境生活部文化振興課

Mie Historical & Cultural Walking Map (Regional Cultural Assets)

古城跡

Nagano Prefectural Museum of History

ADEAC: A System of Digitalization and Exhibition for Archive Collections

三河城屋舗古跡覚書

National Institute of Japanese Literature

IIIF Discovery in Japan

小野平城跡（旗古城跡） : D-204／ ／小野平城跡（旗古城跡）

ADEAC: A System of Digitalization and Exhibition for Archive Collections

下河原古城

Nagano Prefectural Museum of History

ADEAC: A System of Digitalization and Exhibition for Archive Collections

古河城来由

National Diet Library, Japan

ARC Early Japanese Book Portal Database

〔下總古河城古圖〕

Funabashi-shi Western Library

ADEAC: A System of Digitalization and Exhibition for Archive Collections

庄内古川河道跡

ADEAC: A System of Digitalization and Exhibition for Archive Collections

庄内古川河道跡

越谷市教育委員会教育総務部生涯学習課

ADEAC: A System of Digitalization and Exhibition for Archive Collections

庄内古川河道跡

越谷市教育委員会教育総務部生涯学習課

ADEAC: A System of Digitalization and Exhibition for Archive Collections

古河市 大山沼跡

ADEAC: A System of Digitalization and Exhibition for Archive Collections

筑前国中古城跡

Fukuoka City Museum

Fukuoka City Museum Collection Database

山辺氏古城跡図

Nagano Prefectural Museum of History

ADEAC: A System of Digitalization and Exhibition for Archive Collections

史跡 今城塚古墳

Nara National Research Institute for Cultural Properties

Cultural Heritage Video Library | ReelJapan

桐原氏古城跡図

Nagano Prefectural Museum of History

ADEAC: A System of Digitalization and Exhibition for Archive Collections

《越前国古城跡考》

Tokyo National Museum

Integrated Collections Database of the National Museums, Japan

神奈川県指定史跡河村城跡

Nara National Research Institute for Cultural Properties

Cultural Heritage Video Library | ReelJapan

古池城跡 : 菊池十八外城

ADEAC: A System of Digitalization and Exhibition for Archive Collections

城の峰城跡（井上城跡） : G-202／ ／城の峰城跡（井上城跡）

ADEAC: A System of Digitalization and Exhibition for Archive Collections

小山氏城跡・鷲城跡・祗園城跡・中久喜城跡

Oyama

Tochigi Digital Museum "SHUGYOKU" (Cultural Assets)

上平尾村里古城跡

Nagano Prefectural Museum of History

ADEAC: A System of Digitalization and Exhibition for Archive Collections

字立峠山脈古城跡

Nagano Prefectural Museum of History

ADEAC: A System of Digitalization and Exhibition for Archive Collections

伊原・古綾瀬川河道跡

越谷市教育委員会教育総務部生涯学習課

ADEAC: A System of Digitalization and Exhibition for Archive Collections