This is the symbol that will appear on legislation passed by the Welsh assembly.
The Queen formally approved and presented the Welsh seal to First Minister Carwyn Jones.
It will be placed on every act of the assembly, signifying the monarch has given Royal Assent to a bill.
It was designed after the Yes vote in favour of giving the assembly primary law-making powers at the referendum in March.
The seal was created by the Royal Mint to represent the monarchy and Wales.
'Coming of age'
The first minister, who holds the role of Keeper of the Welsh Seal, said: "This new seal is hugely important, both constitutionally and symbolically.
"It will be the first Welsh seal since the days of Owain Glyndwr.
"It marks a coming of age for devolved government in Wales and the new seal will highlight how we are using our new primary law-making powers for the benefit of the people of Wales."