Medieval technology that its potential was fully achieved. Artesian well (1126) A thin rod with a hard iron cutting edge is placed in the bore hole and repeatedly struck with a hammer, underground water pressure forces the water up the hole without pumping. Artesian wells are named after the town of Artois in France, where the first one was drilled by Carthusian monks in 1126. Central heating through underfloor channels (9th century) In the early medieval Alpine upland, a simpler central heating system where heat travelled through underfloor channels from the furnace room replaced the Roman hypocaust at some places. In Reichenau
Murder of the monks of Tibhirine three years earlier. On 30 April, a tape with the voices of the kidnapped monks, recorded on 20 April, was delivered to the French Embassy in Algiers. On 23 May, the GIA's communiqué no. 44 reported that they had executed the monks on 21 May. The Algerian government announced that their heads had been discovered on May 31; the whereabouts of their bodies is unknown. The funeral Mass for the monks was celebrated in the Catholic Cathedral of Notre-Dame d'Afrique (Our Lady of Africa) in Algiers on Sunday, 2 June 1996. Their remains were buried in the cemetery of the