Carolus Rex is the sixth studio album by Swedish power metal band Sabaton.

It is a concept album based on the rise and fall of the Swedish Empire, whose monarch Charles XII gives it its title.

[4] The album received critical acclaim and commercial success, achieving gold certification in Poland and quadruple platinum in Sweden.

In 2015, four Carolus Rex songs were featured in the Sabaton Soundtrack DLC for the historical grand strategy game Europa Universalis 4 by Paradox Interactive.

[8] On 28 September 2018, Sabaton announced that the album had been awarded quadruple platinum status after remaining on the Swedish chart for 326 weeks, and commemorated this with a number of limited edition versions and merchandise.