St. Patrick, the patron saint of Ireland, is a widely known historic figure and arguably the most famous patron saint of a country.
Despite this level of fame, we know surprisingly few details abut his life. Interestingly he's not the only recognised patron saint of Ireland, both 'Brigid of Kildare' and 'Columba' are officially recognised as such.
Also St Patrick is a patron saint of Nigeria, Montserrat and Engineers.
Today, St. Patrick's Day is a day to recognise Irish heritage and celebrated by people of all backgrounds in many parts of the world, such as the United States, Canada, and Australia. Although these are the main overseas populations, St. Patrick's Day is also been celebrated in other locations as far flung from Ireland as Japan, Singapore, and Russia.