Limestone

Limestone is a type of sedimentary rock formed primarily by organic remains like shells or coral."limestone". Merriam-Webster.com Dictionary. Merriam-Webster, Inc. Accessed 7 November 2022. As the chief source for lime, itself a common component of cement,"limestone". Cambridge Advanced Learner's Dictionary. Cambridge University Press. Accessed 7 November 2022. it has been in major use as a construction material for millennia, as far back as the time of ancient Egypt.Discovery Tour: Ancient Egypt – Tours: Building Ancient Egypt
==History==
Limestone was used as the main material in the construction of Egyptian pyramids and monuments, such as the Red PyramidDiscovery Tour: Ancient Egypt – Tours: The Red Pyramid of Dahshur: "A True Pyramid" and the Great Sphinx of Giza.Discovery Tour: Ancient Egypt – Tours: The Riddles of the SphinxAssassin's Creed: Origins Artisans even used the mineral to create sculpturesDiscovery Tour: Ancient Egypt – Tours: Artisans of Ancient Egypt: "Scuplture" and pottery.Discovery Tour: Ancient Egypt – Tours: Evolution of Pottery in Ancient Egypt: "Essential Containers"
During the American Revolutionary War, limestone was sold as a commodity in the thirteen colonies. The Kanien'kehá:ka Assassin Ratonhnhaké:ton used limestone, lead, and iron to create flint with the help of the Davenport Homestead's blacksmith, David Walston.Assassin's Creed III 
Most of Paris' structures were built from limestone because the left bank of the city sat on copious deposits of the rock. Originally, limestone mining was conducted in the outskirts far from the city proper, but the mines were eventually covered over by the city's expansion. Because the practice was to dig horizontally from a shaft until a vein had been exhausted, the mining caused a series of buildings to collapse in 1774. This accident prompted the labyrinthine tunnels to be repurposed as catacombs in 1782, simultaneously relieving the Holy Innocents' Cemetery of its overcapacity.Assassin's Creed: Unity – Database: Les Catacombes 
Blackfriars Bridge in London, built from 1760 to 1769, was constructed with limestone so poor that it had to undergo incessant repairs over the next hundred years until finally, in 1864, it was demolished because the government determined it was more cost-effective to replace it with a new bridge instead.Assassin's Creed: Syndicate – Database: Blackfriars Bridge
==Appearances==
*Assassin's Creed: The Secret Crusade 
*Assassin's Creed III 
*Assassin's Creed IV: Black Flag 
*Assassin's Creed: Pirates 
*Assassin's Creed: Unity
*Assassin's Creed: Syndicate
*Assassin's Creed: Origins
*Discovery Tour: Ancient Egypt
*Discovery Tour: Ancient Greece 
==References==
Category:Minerals
Category:Resources