9th century in architecture

Buildings

 * about 800 – Borobudur temple in Java completed.
 * 802
 * Haeinsa of Korea, is constructed.
 * Palace of Charlemagne in Aachen, Carolingian Empire completed (begun about 790). The Palatine Chapel still stands.
 * At Oviedo in the Kingdom of Asturias
 * Cámara Santa constructed.
 * First reconstruction of Oviedo Cathedral begun by Tioda.
 * 815 – Second Temple of Somnath built in the Pratihara Empire, India.
 * 816 – Reims Cathedral begun.
 * 810s – Chapel of San Zeno in Santa Prassede, Rome decorated.
 * 818 – Old Cologne Cathedral built.
 * 820s
 * Imperial Abbey of Corvey on the Weser founded.
 * Fontanella Abbey reconstructed.
 * 827 – Mosque of Amr ibn al-As in Fustat, Egypt reaches its final form.
 * c. 830–842 – Construction of basilica church of San Julián de los Prados in Oviedo, Kingdom of Asturias, designed by Tioda.
 * 836
 * Samarra founded in Mesopotamia as the capital of the Abbasid Caliphate.
 * Great Mosque of Kairouan founded in Aghlabid Tunisia.
 * 838 – Jawsaq Khakani Palace built in Samarra.
 * 840s – Santa María del Naranco Hall, San Miguel de Lillo constructed.
 * 840 – The main pagoda of the Three Pagodas in Dali, Yunnan, China is built.
 * c. 842 – San Miguel de Lillo in Oviedo, Kingdom of Asturias is built.
 * 847 – St. Peter's Basilica and Basilica of Saint Paul Outside the Walls in Rome partly rebuilt.
 * 848
 * First enlargement of the Great Mosque of Cordoba, in the Emirate of Cordoba finished (begun in 832).
 * Santa María del Naranco built in Oviedo as part of a palace complex of Ramiro I King of Asturias
 * c. 850 – Prambanan Temple built in Java.
 * 851 – Great Mosque of Sousse built in Aghlabid Tunisia.
 * 852
 * Great Mosque of Samarra and Malwiya Minaret completed (begun in 848).
 * Hildesheim Cathedral begun.
 * c. 854 – Balkuwara Palace of Caliph Al-Mutawakkil built in Samarra.
 * 855 – Construction of the second Würzburg Cathedral (building no longer existing).
 * 858 – Invading Vikings set fire to the earliest church on the site of Chartres Cathedral, necessitating its reconstruction.
 * 859 – Halberstadt Cathedral constructed.
 * 861 – Abu Dolaf Mosque built in Samarra (begun in 859).
 * 862 – Reims Cathedral constructed.
 * 864 – Cathedral of Santa Maria Assunta on Torcello partly rebuilt.
 * 869 – City walls of Dijon, Le Mans and Tours reconstructed.
 * c. 870 – Church of St. Apostles Peter and Paul in Serbia is reconstructed.
 * 873 – Imperial Abbey of Corvey begun; church westwork completed c. 885.
 * 875 – Great Mosque of Kairouan in Aghlabid Tunisia reaches its current aspect.
 * c. 875 – The Great Basilica of Pliska, capital of the First Bulgarian Empire is finished.
 * 879
 * Mosque of Ibn Tulun, Fustat, Tulunid Egypt finished (begun in 876; consecrated 884).
 * Preah Ko, first temple built in the Khmer Empire capital of Hariharalaya.
 * 880
 * The oldest Islamic contraction in Iran, the Tarikhaneh Temple (mosque) in Damghan, is built.
 * Nea Ekklesia church in Constantinople consecrated.
 * 881 – Bakong, first temple mountain built in Hariharalaya.
 * c. 883–902 – Shankaragaurishvara Temple in Kashmir built.
 * 885 – Chausath Yogini temple is built in Khajuraho, Chandela kingdom.
 * After 887 – St Mark's Campanile in Venice begun as a watch tower.
 * 893 – Lolei temple in Hariharalaya built.
 * 897 – Reconstruction of Nantes Cathedral begun.
 * 9th century
 * Basilica of Sant'Ambrogio in Milan – the right bell-tower; known as "dei Monaci" ("bell tower of the monks"), is constructed.
 * Derawar Fort in Bahawalpur, Punjab built.
 * Banyunibo Buddhist temple in Java is constructed.
 * Church of Holy Trinity, Split (Crkva sv. Trojstva) in Split, Croatia.
 * Church of the Holy Cross, Nin (Crkva svetog Križa) in Nin, Croatia.
 * Fortified Church of the Saintes Maries de la Mer in Provence.
 * Late 9th century – La Foncalada fountain in Oviedo, Asturias constructed.

Deaths

 * 814 – Odo of Metz, Carolingian architect (born 742)