Patrick arrived on the island of Ireland, in around 432 A.D. and spread the word of Christ there. Study of Latin is known to have spread in the Dark ages, and we have some evidence that there was a golden period, as one can infer from treasures, as the "Book of Kells", that existed before the 9th century AD; during the 9th century, there were intermittent wars with the Viking invaders. (Adapted from, Encyclopedia Ireland, Nation Master.com). As with any invasion in history, this paved way for a new beginning. Though they seemed to have plundered the ancient monasteries, they eventually, helped in laying the foundations of the modern day cities of Dublin, Cork, Waterford, and Limerick.
The settlements from ancient times have been mostly found in the East and the North. This is because, there is almost a semi-circle of mountains, which gives way to the seemingly, unending low central plains. They lend a picture of tranquility to the region, with the ever-present moisture in the air, ensuring the rich pastures. The River Shannon, almost bisecting the island, forms an estuary in the Southwest, and has the city of Limerick, situated near it. In this backdrop, it is easy to understand why Ireland's economy was dependant, for along time, on its farmlands and cheese industry, alongside the fishing hamlets. ...