Sacred well inside courtyard in Bogoeddin, Bukhara, between 1905 and 1915. Arched well in the Bahauddin Naqshbandi complex, near Bukhara. This place is sacred to the followers of Shah Baha al-Din Naqshband, a 14th-century Sufi teacher who was born and died here. Russian chemist and photographer Sergey Prokudin-Gorsky (1863-1944) was a pioneer in colour photography which he used to document early 20th-century Russia and her empire, including the vanishing way of life of tribal peoples along the Silk Route in Central Asia. In a railway-carriage darkroom provided by Czar Nicholas II, Prokudin-Gorsky used the three-colour photography process to record traditional costumes and occupations, churches and mosques - many now Unesco World Heritage sites - as well as modernisation in agriculture, industry and transport.