Thematic (or topical) collecting is very popular in the numismatic community. There are collectors and clubs for a wide range of subjects, from butterflies to lighthouses and from royalty to astronomy, Queen Elizabeth II, Polymer substrate, Hybrid, Odd Denominations, Commemoratives Bank Notes.

 

In the numismatic world, collecting by theme is not as popular or well publicized, but there are still many opportunities to build a collection based on a certain topic, and many collectors who build such collections.