One element of documenting family history is to place the lives of ancestors in the context of their place and time.
Many of the places we study have their own history, evolving from farming villages to manufacturing centres to dormitory suburbs (for example). That history is documented in many different forms, included the design of armorial bearings. The images selected to represent the area can provide important insights into its nature and history.
All kinds of entities can possess (so-called) coats-of-arms -- people, families, organizations and municipalities (towns and other levels of government). I am referring to the designs usually depicted on a shield or a flag, NOT the more elaborate presentations used as seals on documents.
Typically, there are restrictions on the use of arms, which may be outlined in the grant document. We normally hear about people who use individual coats-of-arms as if they were family coats-of-arms, without authorization. And organizations will protect trademarks.
A town (or similar body) may not only display its arms on its official buildings, but also mould them into street furniture and even print them on bus tickets. You can also see the use of municipal shields and flags in a lot of non-official settings.
Who has a "right" to display images of these? Is residence (current or former) in the area a sufficient reason? What are the other restrictions on the use of municipal coats-of-arms? It seems that municipal coats-of-arms treated differently to individual/family coats-of-arms. Why?