Tax included and shipping calculated at checkout
Size guide

Use the guide below to help choose the best fit for your T-shirt. Measurements are provided in inches and may vary slightly within the stated tolerance.

Measurement Guide
- Width: Measured across the chest, one inch below the armhole when laid flat.
- Length: Measured from the highest point of the shoulder to the bottom hem.
- Sleeve Length: Measured from the centre back of the neck to the sleeve hem.
- Size Tolerance: All measurements have an approximate tolerance of ±1.5 inches.
Fit Advice
- For a more relaxed fit, consider sizing up.
- Compare these measurements with a favourite T-shirt you already own for the most accurate fit.
- If you are between sizes, the larger size is usually the most comfortable option.
Most people know the wizard. Far fewer know where he came from.
The Merlin of popular imagination, the white-bearded conjurer at Arthur's court, is a character assembled over centuries from sources most people have never encountered. The Welsh material that gave him life tells a different story: a man called Myrddin, a survivor of catastrophic battle, a prophet living wild in the forests of southern Scotland, speaking verses that frightened kings.
This free illustrated guide traces that journey. It covers the figure behind the legend, the texts that shaped him, and the process by which a Welsh prophet became the defining wizard of British mythology.
What the poster covers
The guide is designed as a single portrait poster, illustrated and formatted for print. It gives you the key information in a form you can keep on a wall, use as a teaching resource, or refer back to when reading further. It covers:
- Myrddin Wyllt: the wild prophet figure and his roots in Welsh tradition
- Geoffrey of Monmouth's transformation of the legend in the 12th century
- The Arthurian connection and how Merlin became indispensable to the cycle
- The enduring qualities that kept the legend alive across a thousand years of retelling
Serious history, designed to be used
This is not a decorative print padded with vague claims. The content reflects the same approach to Welsh myth and medieval source material that runs through Simon A. Williams' published work, including The Truth Behind Welsh Myths and Legends (2025). It is accurate, specific, and built for people who want to understand the legend, not just admire it.
If the poster leaves you wanting more, the blog carries a full series on Merlin's Welsh origins, the sword in the stone, and the secrets behind the magic. The illustrated guide is the beginning of that conversation.
Download it now and print it when you are ready.
What you receive
A high-resolution portrait poster in PDF format, delivered instantly upon completing the free checkout. Print-ready at home or at a print shop.
Format
Portrait orientation. Illustrated infographic layout with text, images, and historical detail. Optimised for A3 or A4 print.
Cost
Free. No subscription required. No payment details needed.
Read more
Pair this poster with the full Merlin article series on the Histories and Castles blog, covering his Welsh origins, the Arthurian legend, and the stories behind the magic.
Read More About Merlin
