Robert of Matters Arising in his mythology series is blogging Isis and Osiris, with nice images.
The story of the Egyptian gods Isis and Osiris, their brother Set, their child Horus, and the sun god Ra is well known from a mixture of native Egyptian texts and from texts written by the 2nd century AD Greek biographer and philosopher Plutarch, and the slightly later Roman novelist Apuleius. read on
Roman fresco from the temple of Isis in Pompeii, Io is welcomed in Egypt by Isis.
Museo Archeologico Nazionale (Naples), courtesy Wikimedia Commons