I'm well aware that the Galactic Empire from Isaac Asimov's has a famous emblem consisting of the "Spaceship and Sun".
I was wondering if the Foundation itself1 has an equivalent emblem described or depicted somewhere: it's been some years since I have read the Foundation books (except the two prequels Prelude to Foundation and Forward the Foundation), and I can't recall if this is described somewhere. I'm planning a re-read of all Asimov's main books, but not immediately; maybe someone can help me with this meanwhile.
I'm really interested in answers that take in consideration also works by other authors, not just by Asimov himself, but please keep them limited to officially authorized/recognized as part of the broader cycle (e.g. the Second Foundation series by Benford, Bear & Brin, the Foundation's Friends anthology, etc.).
Please avoid fan-fiction.
1. I mean the institution founded by Hari Seldon, not the book series