First and foremost, art existed because the Church required it. The basic tools of the Roman Catholic mass, thousands of golden art objects were made. Sacred cups, vessels, reliqueries, crucifixes, rosaries, altar pieces, and statues of the
Virgin and Child or Saints all kept the flame of art from dying out in the period. Architecture began to revive to some extent by the 9th century. It took the form of Church facilities of all kinds, and the first castle fortifications since
Roman times began to take form in simple "moat and baily" castles, or simple "strong point" tower structures, with little refinement.
The Arab merchant Shulama wrote that Chinese junk ships could carry 600 to 700
passengers aboard for sailing missions into the Indian Ocean. He wrote that the draft of Chinese ships was too deep for entering the Euphrates River (modern-day Iraq), which forced them to land small boats on the banks of the river for passengers and cargo instead.
851 ? The Arab merchant Suleiman al-Tajir visits the Chinese seaport at Guangzhou in southern China, and observes the manufacturing of porcelain, the Islamic mosque built at Guangzhou, the granary system of the city, and how its municipal administration functioned.