Built in the 9th century
WHS whose OUV derives entirely or significantly from 9th century constructions. Where construction straddles the centuries the date of conception/commencement is used i.e which century does the site really "belong" to in spirit.
Abbey of St Gall Apogee 816-837
Angkor First capital from 802, earliest remaining temples date from ca. 880. Lots of later additions though, Angkor Wat for example dates from the 12th century.
Bali Subak system Around the 9th century the subak system was introduced (AB ev)
Benedictine Convent of St. John murals painted c. A.D. 800 + noted from the beginning of the 9th century as being an establishment of Benedictines
Borobudur Ca. 800
Cahokia Mounds was occupied primarily during the Mississippian period (800-1350) (AB ev), mound building at this location began with the Emergent Mississippian cultural period, about the 9th century CE (wiki)
Corvey between 822 and 885
Costiera Amalfitana Independent Republic from 839 on, and became a maritime trading power from the 9th century. Amalfi Cathedral dates from the 9th century too, though it and other major monuments have been altered and added in the course of the 10th-13th centuries
El Tajin one phase of occupation lasting from 800 to 1200 (AB ev)
Kairouan The Great Mosque was rebuilt in the 9th century
Kii Mountain Range A number of the individual Buddhist and Shinto shrines have histories dating back to the 5C. E.g Seiganto-ji (Legend suggests this temple was founded in the early 5C) and Yoshino Mikumari-jinja (a Shinto shrine documented as early as 698) ... The Shinto religion which nurtures the spirit of nature worship has been practised in Japan since ancient times. In the 6th century Buddhism was introduced into Japan and adopted...in the second half of the 7th C. It did not supplant Shintoism. Instead .. a unique form of Shinto-Buddhism evolved, based on the belief that Japanese traditional gods are the incarnations of Buddhist deities. The Kii Mountains became the centre for this religious movement in the 9/10Cs (AB)
Masjed-e Jâme' Different theories exist - the Abbasid mosque dates from 841 (built on top of earlier structures)
Medina of Fez "The Medina of Fez preserves, in an ancient part comprising numerous monumental buildings, the memory of the capital founded by the Idrisid dynasty between 789 and 808. It is home to the oldest university in the world (Al-Karaouine - 859)."
Ohrid Region Earlier origins, but Church of Saint Panteleimon and birth of Slavic literacy and culture date from the time of St. Clement (886-916)
Samarra Samarra was laid out as a new city in 836 by the Abassid Caliph al-Mu'tasim who wished to create a new court residence and army base outside Baghdad. He died in 847 with the city's mosques and palaces only partly completed but his successor continued with new plans. By 892 a subsequent Caliph returned the capital to Baghdad an, although habitation continued on the site much of the monumental area was abandoned.
West Lake The main artificial elements of the lake, two causeways and three islands, were created from repeated dredgings between the 9th and 12th centuries. (AB ev)
Do you know of another WHS we could connect to Built in the 9th century?