With the take-over by the English Parliament of the Tower mint in 1642, the king set up his permanent headquarters at Oxford and established his main mint there. Most pennies produced there were made from dies from the Aberystwyth mint, so they look very similar to Aberystwyth coins. There is a very rare "Declaration penny" produced in 1644 where the reverse contains the declaration RELIG PRO LEG ANG LIBER PAR 1644 — "The religion of the Protestants the laws of England the liberty of Parliament". The Oxford mint closed in 1646.