Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Prehistoric Rock Art Sites in the Côa Valley and Siega Verde' has mentioned 'Valley' in the following places:
Occurrence Sentence Text Source
Prehistoric Rock-Art Site of the Cxc3xb4a ValleyLocation of the Cxc3xb4a Valley within Continental PortugalLocationGuarda, Douro, Norte, PortugalTypePrehistoric artLength17,000xc2xa0m (56,000xc2xa0ft)Area200xc2xa0km2 (77xc2xa0sqxc2xa0mi)Site notesArchaeologistsUnknownOwnershipPortuguese RepublicPublicxc2xa0accessPublicWebsitehttp://www.arte-coa.pt/
The Prehistoric Rock-Art Site of the Cxc3xb4a Valley is an open-air Paleolithic archaeological site located in northeastern Portugal, near the border with Spain.
In the early 1990s rock engravings were discovered in Vila Nova de Foz Cxc3xb4a during the construction of a dam in the Cxc3xb4a River valley.
The Archaeological Park of the Cxc3xb4a Valley (Portuguese: Parque Arqueolxc3xb3gico do Vale do Cxc3xb4a (PAVC)) was created to receive visitors and research the findings, and the Cxc3xb4a Museum was constructed here following a major design competition.
The earliest drawings appearing in the Cxc3xb4a Valley date between 22xe2x80x9320 thousand years B.C., consisting of zoomorphic imagery of nature.
[6] By the 1990s, prospectors revealed a group of important Paleolithic, Neolithic and Chalcolithic carvings in the lower part of the Cxc3xb4a Valley, likely in November 1991 by Nelson Rabanda (articles were not published on this work until November 1994).
In 1995, a plan to construct a dam was approved and works began in the Cxc3xb4a Valley.
[6] However, following the original discovery of rock art, an archaeologist had been investigating the Cxc3xb4a valley under the direction of the national energy company (Energias de Portugal xe2x80x93 EDP) and the agency responsible for architectural heritage (Instituto Portuguxc3xaas do Patrimxc3xb3nio Arquitectxc3xb3nico xe2x80x93 IPPAR).
The UNESCO reports were not unanimous on whether the power plant should be cancelled; Clottes, the head of prehistoric department, noted that rising water may protect the engravings from vandalism, but also confirmed that Coa Valley "is the biggest open air site of palaeolithic art in Europe, if not in the world".
Meanwhile, after the visit by the UNESCO delegation, IPPAR created an international scientific commission to accompany the study of the art in the Cxc3xb4a valley.
The government established a system to monitor and preserve the archeological resources; the events of the so-called "Battle of Cxc3xb4a" led to the establishment in May 1997 of the National Centre for Prehistoric Art (Portuguese: Centro Nacional de Arte Rupestre/CNART) and the Archaeological Park of the Cxc3xb4a Valley (Portuguese: Parque Arqueolxc3xb3gico do Vale do COa/PAVC)), the Portuguese Institute of Archaeology (Portuguese: Instituto Portuguxc3xaas de Arqueologia, as well as dependent agencies.
The Prehistoric Rock-Art Sites in the Cxc3xb4a Valley were designated a World Heritage Site by UNESCO in 1998 (from an advisory board report on 25 June 1997).
Its dating to a similar period allowed its inclusion in the world heritage designation along with the Cxc3xb4a Valley sites.
In March 2018, the Cxc3xb4a Valley Sites and Museum were added to the Cultural Routes of the Council of Europe,[16] along other major prehistoric sites like Lascaux (France), Altamira (Spain) and Valcamonica (Italy).
The lower portion of Cxc3xb4a River Valley runs south to north, at about 130 metres above sea level, spread over an area of 17xc2xa0km2 (6.6xc2xa0sqxc2xa0mi).
The Cxc3xb4a Valley archaeological park comprises 23 sites with engravings or paintings, along the final 17 kilometres of the River Cxc3xb4a, with ten sites on the left bank and eight on the right bank.
Prehistoric Rock-Art Site of the Cxc3xb4a Valley xe2x80x93 Penascosa xe2x80x93 Bull
The Junta de Castilla y Lexc3xb3n has developed joint programmes with the Portuguese institution of IGESPAR (Istituto de Gestxc3xa3o do Patrimxc3xb3nio Arquitectxc3xb3nico e Arqueolxc3xb3gico xe2x80x93 Institute for the Management of the Architectural and Archaeological Heritage), which is responsible for the Cxc3xb4a Valley site, with the object of studying and presenting Siega Verde and Cxc3xb4a Valley together.