Is there a seqeul to 300?

Yes, there is a sequel to "300" titled "300: Rise of an Empire," which was released in 2014. While it is not a direct continuation of the original film, it is based on Frank Miller's graphic novel "Xerxes" and explores the naval battles between the Greeks and the Persians during the same time period as the first film. The sequel features a different storyline and characters but maintains the visual style and themes of the original.