The venue in the Welsh capital saw rugby's arguably most famous ever score by Gareth Edwards for the Barbarians against New Zealand in an iconic fixture.
The consider Munster's Thomond Park, one of the most feared grounds in world rugby to visit and even saw the club defeat the mighty All Blacks 12-0 in 1978 - few international sides can boast that statistic.
Venues have sprung up in recent years like the Aviva Stadium, which is a wonderful facility, while Leinster's RDS has hosted the 2010, 2012, 2013 and 2014 Celtic League finals and the 2013 European Challenge Cup Final.
GUINNESS PRO12 fans are blessed by the wonderful facilities now on offer across Wales, Scotland, Ireland and Italy and here's a look through what makes each ground quite so special and a statistic perhaps you never knew.
Galway Sportsground (Connacht)
It is best known as the home of Connacht but it's not just rugby fixtures that this famous old ground has hosted over the years.
Weekly it is the venue for dog racing on a Friday and Saturday night, while t has occasionally hosted Gaelic fixtures, most notably the 1932 All-Ireland Senior Camogie Championship Final and the 1942 Galway County Hurling Final.
When Terryland Park was being renovated in 1993 Galway United played at the Sportsground for the first part of that season. It also hosted Galway's first game in European competition in the 1985-86 European Cup Winners' Cup.
BT Cardiff Arms Park (Cardiff Blues)
The then-national stadium is best known as the venue for what is considered to be the greatest try ever scored by Gareth Edwards for the Barbarians against New Zealand in what is also called the greatest match ever played on 27 January 1973.
It also played host to the inaugural Heineken Cup final of 1995-96 when Toulouse beat Cardiff RFC by 21-18 after extra time, in front of 21,800 spectators.
Now it's the Blues who ply their trade in the ground and have enjoyed some memorable moments in the grand old stadium.
BT Murrayfield (Edinburgh Rugby)
On 21 March 1925 England were the first team to visit BT Murrayfield, with 70,000 people watching Scotland beat them to win their first Five Nations Championship Grand Slam.
During the Second World War the ground was offered to the nation and was taken over by the Royal Army Service Corps and used as a supply depot.
Murrayfield's record attendance of 104,000 was set on 1 March 1975 when Scotland defeated Wales 12-10 during the 1975 Five Nations Championship. This attendance stood as a world record until 1999.
Stadio Monigo (Treviso)
The rugby club in Treviso is one of the oldest in Italy, having been founded in 1932 and they have been a force in Italian rugby over the years, racking up 15 national titles.
The side have competed in the European Cup every year since 2002, without ever qualifying for the knock-out phases.
Their Stadio Monigo ground was opened all the way back in 1973 and hosted the first-ever Pro 12 game on Italian soil in 2010 - a 34-28 win over the Scarlets.
RDS Arena (Leinster)
The home of Leinster, the RDS hosted the first-ever Celtic League Grand Final in 2010, and has hosted three more in 2012, 2013 and 2014, as well as the 2013 Challenge Cup final.
It has played host to an autumn international between Ireland and Fiji in 2009 and is considered a world class facility.
The 2007-08 season saw the RDS become the official home of Leinster when they signed a 20-year lease on the ground.
Liberty Stadium (Ospreys)
It is the home of both Premier League club Swansea City and the Ospreys. As a result of Swansea City's promotion, the stadium became the first Premier League ground in Wales.
It is the third largest stadium in Wales and the Ospreys began playing at the ground during the 2005-6 season.
Scotstoun (Glasgow Warriors)
Scotstoun Stadium was used as a training venue for the 2014 Commonwealth Games and is regularly used for premier athletics events attracting world class athletes from all over the UK.
It became the training base for the Glasgow Warriors rugby team in 2009 who subsequently started playing home games at the venue in September 2012, moving from their previous home at Firhill.
Scotstoun first hosted the Scottish leg of the IRB World Sevens Series in May 2012, and has continued to host the event to date.
Stadio Sergio Lanfranchi (Zebre)
The stadium was named after Sergio Lanfranchi (1925-2001), an international rugby union prop from Parma who played for Italy from 1949 to 1961 and spent most of his club career in France.
The original ground was a 3,600 seat arena which hosted Gran Parma Rugby and Rugby Parma F.C. 1931. It also hosted the Parma Panthers American Football team. The stadium is described and referenced numerous times in the book Playing for Pizza by John Grisham.
This stadium was demolished in 2008, and replaced by the Stadio XXV Aprile, which has since been renamed the Stadio Sergio Lanfranchi. Zebre have played their home games in the ground since joining the GUINNESS PRO12.
Thomond Park (Munster)
The stadium holds a special place in rugby due to its own unique history and atmosphere. The stadium is famed for its noise during play and the complete silence while home and away players are kicking for goal.
Munster also retained an intimidating 12 year unbeaten run at Thomond in the Heineken Cup - running from the competition's start in 1995 until 2007 when the Leicester Tigers broke the streak with a 13-6 win.
It is at Thomond park that Munster celebrated their 12-0 victory over the All Blacks in 1978.
Parc y Scarlets (Scarlets)
Parc y Scarlets officially opened on 15 November to Llanelli RFC who played the first match at the stadium in a 32-3 win over Cardiff RFC in the Principality Premiership.
The Scarlets hosted their first match at Parc y Scarlets on 28 November against Munster in the Celtic League, while their first Heineken Cup match in the new stadium was on 12 December against Ulster.
The official opening ceremony was held on 31 January 2009 when the Scarlets hosted the Barbarians, defeating them 40-24.
Kingspan Stadium (UIster)
The 2015 GUINNESS PRO12 Grand Final was played at the Kingspan Stadium as Glasgow Warriors beat Munster Rugby 31-13.
Previously known as Ravenhill, it has hosted memorable Ulster games in the Heineken Cup, notably as they won the competition in 1999.
Redeveloped in 2012, the refurbishments were completed in 2014 in time for the Grand Final the following year, the first to be played at a neutral ground.
Rodney Parade (Newport Gwent Dragons)
The home ground of both the Dragons and Newport RFC, Rodney Parade is one of the oldest stadia in the GUINNESS PRO12.
Football team Newport County also ply their trade at the ground, and it is the second oldest sports venue in the Football League.
It has hosted six international matches, although the last was all the way back in 1912, with the other five taking place in the 19th century.
Principality Stadium
The home of Judgement Day as well as the Welsh national team, Principality Stadium welcomed 52,762 people in April 2015.
The Judgement Day matches began in 2013, and will continue again this year with two matches on April 30th as Cardiff Blues take on the Ospreys and the Dragons face the Scarlets.
Aviva Stadium
Redeveloped on the old Lansdowne Road site, the Aviva Stadium was officially reopened in 2010.
The first official points at the Aviva were scored by Ulster's Craig Gilroy with a try in the O2 Challenge, an exhibition match between the four Irish provinces.
The ground also hosted the highest-ever GUINNESS PRO12 attendance for a single game of 51,700 when Leinster beat Munster in March 2014.
Stradey Park
No longer used after the opening of Parc y Scarlets, Stradey Park is one of the most iconic former venues in the history of the GUINNESS PRO12.
The ground originally opened in 1879 for use by Llanelli RFC. In 1887, Stradey Park was chosen to host its first international rugby union match.
In the early days of international rugby, all the British countries switched venues on a regular basis to allow supporters the chance to see their team and clubs the opportunity of share gate receipts.
The final game to be played there took place in 2008.
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