02192nas a2200325   4500000000100000000000100001008004100002653001200043653001700055653001000072653001200082653001900094653001200113653001000125653001900135653001200154653002600166653001700192653001800209653001800227653001500245100003000260700001600290245011000306856015000416300001000566490000700576520126300583022002001846                                       d10aAshlars10aConservation10aDecay10aGranite10aMadrid [Spain]10aPlinths10aSpain10abuilding stone10aGranite10aheritage conservation10aneighborhood10arefurbishment10asocial change10aurban area1 aDavid Martin Freire-Lista1 aRafael Fort00aHistorical City Centres and Traditional Building Stones as Heritage: Barrio de las Letras, Madrid (Spain)  uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85048109463&doi=10.1007%2fs12371-018-0314-z&partnerID=40&md5=992b9f30754a1286c2957fc979a5ba52  a71-850 v113 aTraditional building stones are part of a city’s tangible and intangible heritage. Their conservation is essential to maintaining the integrity of historic city centres. Barrio de las Letras is one of the most historic and touristic neighbourhoods in Madrid, the capital of Spain. Social change over the last few decades has also contributed to the decay of its building stones. Fifty-eight percent of the streets in Barrio de las Letras exhibit interventions in the majority of the buildings that cover the original stone plinths, thus damaging the integrity of the stone of this neighbourhood. The plinths on the busiest streets suffer the greatest decay. The building stones of Barrio de las Letras are in a highly vulnerable condition. However, in recent years, there is a trend towards refurbishment with traditional building stones. This study aims to identify the building stones used in the plinths of historic buildings in Barrio de las Letras and determine their origin and state of decay. Mapping of all the stones that make up the plinths of buildings in this neighbourhood has been achieved. This investigation of materials can provide data of great interest for heritage studies, assisting in the provision of suitable conservation solutions.  a18672477 (ISSN)