The Byzantine Empire Decanummium (also spelled Dekanummion) is a bronze coin valued at 10 nummi, part of the Byzantine coinage system often issued from the 6th century onward. Typically weighing just under five grams, the Decanummium featured the Greek numeral “I” (iota) representing its value on the reverse. It was minted in various Byzantine mints including Constantinople, Ravenna, and others, and was part of a broader currency system designed to facilitate everyday transactions among the empire’s citizens.

Featuring depictions of reigning emperors and Christian symbols such as crosses and stars, these coins were functional yet often showcased the authority and faith of the Byzantine state. The Decanummium had a somewhat broad flan and was made of bronze or copper alloys, exhibiting characteristics such as age-appropriate patina and signs of historical wear, which add to its numismatic interest.

Coins certified by NGC with “gorgeous patina and grease” indicate natural aging and preservation of original surfaces, often with attractive toning or a sheen resulting from centuries of oxidation and handling. This natural patina enhances the coin’s beauty and historic authenticity, making it desirable among collectors who appreciate well-preserved Byzantine bronzes.

In summary, a Byzantine Empire Decanummium with NGC certification, gorgeous patina, and preserved grease is a prized collectible. It represents a tangible piece of Byzantine everyday life and imperial authority, preserved with natural aging that highlights its long journey through history.