Complex sentence: An earlier monastery was founded by, then later dedicated to, Saint Aidan of Lindisfarne shortly before his death in 651 at Old Melrose, then in the Anglo-Saxon Kingdom of Northumbria on a site about two miles (3 km) east of Melrose Abbey.
Split into simpler sentences: An earlier monastery was founded by, then later dedicated to, Saint Aidan of Lindisfarne. This was shortly before his death in 651 at Old Melrose, then within the Anglo-Saxon Kingdom of Northumbria, on a site about two miles (3 km) east of Melrose Abbey.