Samarra Iraq - 1 of largest ancient city in the whole world. A dominating, magnificent structure that was once the largest mosque in the Islamic world built by Caliph Al-Mutawakkil in 852 AD using bricks and clay.The Mosque's minaret is the famous Spiral (Al-Malweyya 52 m high on the northern side). Some historians believe that it pre-dates the Mosque and that Caliph Al-Mu'tasim built it.
Nakaoka Shintarō (中岡 慎太郎 May 6, 1838 – December 12, 1867) was a samurai in Bakumatsu period Japan, and a close associate of Sakamoto Ryōma in the movement to overthrow the Tokugawa shogunate. December 10, 1867 he travelled to Kyoto for discussions with Sakamoto Ryōma, but was killed together with Sakamoto when unknown assailants attacked their lodgings (i.e. the "Ōmiya Incident").