👉 Heimdallarchaeales is a genus of fungi in the family Penicillariaceae, which includes species that are known for their ability to produce a variety of substances used in art and architecture. Some common examples include Heimdallar, which produces gold leaf on walls; Heimdallarum, which contains a red pigment called Heimdallarum red; and Heimdallarum green, a light brown coloration resembling gold.