Who was emperor after antoninus pius?

After Antoninus Pius, the Roman Emperor who succeeded him was Marcus Aurelius. He ruled from 161 to 180 AD and is often remembered for his philosophical writings, particularly the "Meditations," which reflect his Stoic beliefs. Marcus Aurelius co-ruled with Lucius Verus initially, until Verus's death in 169 AD, after which Marcus ruled alone. His reign is noted for its challenges, including military conflicts and the Antonine Plague.