Ticket for https://community.metabrainz.org/t/event-art-logo-type/814530:

A 'logo' event art type should be added for events that have their own logo specific to it, rather than on an event-series level.

This typically applies to conventions that occur on a yearly basis, from what I've seen, but it most likely extends to other event types as well.

Some examples:

• https://musicbrainz.org/event/17b70c3b-1195-4bd9-9985-402e18efc22a/event-art
  • https://eventartarchive.org/event/17b70c3b-1195-4bd9-9985-402e18efc22a/44674535485.png
• https://musicbrainz.org/event/4f18cc6d-9d47-49c4-a1a6-bfb43c21c3c3/event-art
  • https://eventartarchive.org/event/4f18cc6d-9d47-49c4-a1a6-bfb43c21c3c3/44483872144.png
• https://musicbrainz.org/event/412a747b-9833-4ab1-88d4-c87aef12c88f/event-art
  • https://eventartarchive.org/event/412a747b-9833-4ab1-88d4-c87aef12c88f/44674658146.png