Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Earliest 16th-Century Monasteries on the Slopes of Popocatepetl' has mentioned 'Altar' in the following places:
Occurrence Sentence Text Source
[5] The last round of major renovations and changes, which included the restoration of its murals by specialists and the addition of modern elements, especially in the main altar area, occurred in the late 1970s and early 1980s.