Complex sentence: The Gaels are depicted as wandering from place to place for hundreds of years; they spend time in Egypt, Crete, Scythia, the Caspian Sea and Getulia, before arriving in Iberia, where their king, Breogán, is said to have founded Galicia.
Split into simpler sentences: The Gaels are depicted as wandering from place to place for hundreds of years; they spend time in Egypt, Crete, Scythia, the Caspian Sea and Getulia, before arriving in Iberia. It is here that their king, Breogán, is said to have founded Galicia.