茨城県[ibarakiken] Ibaraki prefecture (Kantou area)
王城[oujou] royal castle
下城[gejou] withdrawing from the castle
牙城[gajou] stronghold (esp. of an enemy or opponent)
開城[kaijou] capitulation (of fort)

宮城[kyuujou] Imperial Palace
宮城県[miyagiken] Miyagi prefecture (Tohoku area)
傾城[keisei] beauty
堅城[kenjou] strong fortress
古城[kojou] old castle

遺蹟[iseki] historic ruins (remains, relics)
筆蹟[fudeato] handwriting
偉蹟[iseki] remaining works
奇蹟[kiseki] miracle
史蹟[shiseki] historical landmark

真蹟[shinseki] true autograph
事蹟[jiseki] evidence
古蹟[furuato] historic spot
城蹟[joushi] castle site
手蹟[shuseki] holograph