The dominance of the Celts over Europe was gradually replaced by the rise of Rome and then finished on the continent by the great Germanic migrations that caused Rome's fall. Whilst the Celts in mainland Europe were in catastrophic decline, the Insular Celts of the British Isles were thriving. The Insular Celts were a major factor in the spread of Christianity in north-west Europe during this time. During the Middle Ages, the smaller Celtic kingdoms of the British Isles amalgamated into larger kingdoms, such as Rìoghachd na h-Alba, which later became the kingdom of Scotland. Much of the history of the Celts at this time is occupied with internal conflict amongst rival Celtic kingdoms and clans and external conflict against Anglo-Saxons, Vikings and Normans. | The dominance of the Celts over Europe was gradually replaced by the rise of Rome and then finished on the continent by the great Germanic migrations that caused Rome's fall. Whilst the Celts in mainland Europe were in catastrophic decline, the Insular Celts of the British Isles were thriving. The Insular Celts were a major factor in the spread of Christianity in north-west Europe during this time. During the Middle Ages, the smaller Celtic kingdoms of the British Isles amalgamated into larger kingdoms, such as Rìoghachd na h-Alba, which later became the kingdom of Scotland. Much of the history of the Celts at this time is occupied with internal conflict amongst rival Celtic kingdoms and clans and external conflict against Anglo-Saxons, Vikings and Normans. |