Rob Kearney of Leinster and Andrew Trimble of Ulster contest a high ball during last season’s Pro12 semi-final at the RDS. Photograph: Ryan Byrne/Inpho.

Maybe, just maybe, the Celtic League/Magners League/Rabo Pro12/ Guinness Pro12 has come of age. As(...)

Johnny Sexton’s mooted return from France to play for Leinster next season has been welcomed even by rival provinces. Photograph:  Alan Crowhurst/Getty Images

The great and the good of Celtic and Italian rugby assembled for the launch of the Guinness Pro12(...)

Pro 12 holders Leinster celebrate defeating Glasgow Warriors in the final last season. Photograph: Inpho

JOHN O’SULLIVAN The official announcement of Guinness as the new sponsors of the Pro 12 tournament(...)

 Brian O’Driscoll, Leinster leaves the pitch against Glasgow Warriors, in last season’s  Pro12 final in the RDS. Photograph: Dara Mac Dónaill/The Irish Times

(...). Celtic Rugby also today announced the Pro12 fixtures for next season (2014-2015) with the opening weekend(...)

Guinness have been a long-time sponsor of the autumn international series. Photograph:  Dara Mac Dónaill

(...) of the Guinness Pro12 likely to following directly after the 22-match league format concludes.Celtic(...)

 David Humphreys is to leave Ulster for Gloucester. Photograph: Inpho

(...), the Celtic Cup and the Celtic League, will join former Ulster prop John Afoa at Gloucester after the(...)

“It’s three years we’ve been building towards this. Everything is in place; it’s our task to get the job done,” said Ryan Grant of Glasgow Warriors during the week. Photograph:  Ian MacNicol/Getty Images

(...) frustrating tale of woe in this play-off phase of the RaboDirect Pro12 tournament. On four occasions in the(...)

Rory Best, out since the Heineken Cup quarter-final defeat at home to Saracens six weeks ago, could make the Ulster side to meet Leinster in the RaboDirect Pro12 semi-final at the RDS on Saturday. Photograph: Darren Kidd/Inpho/Presseye

Ulster are set to receive a timely boost in advance of Saturday’s RaboDirect Pro 12 semi(...)

Leo Cullen’s calmness under pressure meant he usually made the right calls in a game, especially at the lineout. Photograph: James Crombie/Inpho

(...)’s Leinster career (1998 to 2005) was largely frustrating, despite the Celtic League triumph of 2002 under(...)

Brian O’Driscoll at the Leinster press conference prior to the clash with Edinburgh: “To have managed to win some of those trophies along the way and put Leinster out there and onto a little bit of a pedestal in European and maybe world rugby at club level, it is special to know that I was part of that.” Photo: Cathal Noonan/Inpho 1:25

Heineken Cups and three League titles in each of its Celtic /Magners/Rabo Pro12 guises. “There have been(...)