The world's biggest stout brewery has been officially opened by the Taoiseach in Dublin. The Guinness "Brewhouse No. 4" cost €169m to construct at the St James's Gate site in central Dublin.

The new development means three million pints are now produced at St. James's Gate per day.

Currently Diageo exports more than €1bn in product from the site to over 130 countries while the Guinness Flavour Essence - which is produced in St. James’s Gate - enables further brewing of Guinness in 50 countries around the world.

The Taoiseach said: "I'm delighted to open the new Diageo brewery at St. James’s Gate. Ireland has a worldwide reputation for quality food and drink production and this new €169 million investment in the heart of Dublin will help contribute to our export led recovery. St. James Gate has a long history of supporting local jobs while sending iconic Irish brands around the world."

"The government's plan for recovery will see continued support for our indigenous export orientated food and drink sector which provides jobs across the island of Ireland."

Take a brief tour below: