megalography
The depiction of great or grand things, such as heroes and gods; painting on a large scale
uncountable
The room was decorated with magnificent megalography, overwhelming the viewer upon entrance.
Where it comes from
From Ancient Greek μεγαλογραφία (megalographía). Morphologically megalo- + -graphy,
Adapted from the Wiktionary entry megalography (CC BY-SA 4.0).