Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Roman Walls of Lugo' has mentioned 'Stone' in the following places:
Occurrence Sentence Text Source
The walls consist of internal and external stone facing with a core of earth mixed with gravel, pebbles and worked Roman stone recycled from demolished buildings, cemented with water.
The Walls are built of internal and external stone facings of slate with some granite, with a core filling of a conglomerate of slate slabs and worked stone pieces from Roman buildings, interlocked with lime mortar.