Byzantine Cup Coin Filter
Collector's Reference Tool

Byzantine Cup Coin Filter

A visual identification aid for late Byzantine trachea · 1081–1453

Hello and welcome. This is a work in progress, and I've reached the point where I could really use input from more experienced collectors.

I began with a group of worn cup coins and quickly found that working through Catalogue of the Late Byzantine Coins, Vol. I page by page wasn't very efficient. To improve the process, I created a database, recording details that seemed most useful for narrowing down identifications — while intentionally ignoring inscriptions due to their condition.

After completing CLBC, I expanded the dataset using entries from the Labarum Byzantine Coin Catalog. Even then, inconsistencies remained.

In April 2026, while researching on ACSearch, I discovered a major issue: auction houses often use different terminology amongst each other for clothing and iconography, and these don't always align with CLBC.

I'm now rethinking how to move forward without losing too much work. If you have experience with trachy coins, I would greatly appreciate your feedback.

For now, please focus on the CLBC option in the upper left. The "Work in Progress" tab is not yet ready for review.

Standard references describe coins differently. The Catalogue of Late Byzantine Coins (CLBC, 1081–1453) provided the foundation for this project because of its detailed typology and illustrations. I cross-referenced with Labarum.info and auction records on acsearch.info, only to discover how much variation exists in how coins are labeled.

To make the site more accessible to beginners, I sometimes use simplified or more common terms instead of strict scholarly ones:

These choices reflect my own learning process and aim to reduce the barrier for those who haven't yet mastered the full numismatic vocabulary.

The main purpose here is not to definitively identify your coin, but to quickly reduce the possibilities using positive and negative filters based on visible features — the emperor's pose, objects held, symbols in the field, and so on. Once you've narrowed the results to a manageable handful, consult professional references for final attribution:

A Note on Limitations Descriptions in numismatic catalogs often rely heavily on inscriptions, which can be worn, off-center, or hard to read on cup coins. This tool deliberately emphasizes other diagnostic features to help shortcut the search.

If you have suggestions for improvements, better terminology, or additional coins to consider, feel free to reach out at the.10th.legion@gmail.com. This is very much a work in progress created by one collector trying to help others.

Happy hunting — and welcome to the fascinating world of late Byzantine coinage!