Joseph I was the Holy Roman Emperor from 1705 until his death in 1711. He was the son of Leopold I and became emperor after his father's long reign. Joseph I focused on strengthening the central authority of the empire and promoting reforms in administration and military. During his reign, Joseph I faced challenges such as the War of the Spanish Succession, which involved several European powers. He worked to maintain peace and stability within his territories, but his reign was relatively short, ending with his untimely death at the age of 33.