BBC Wales has won 14 awards at the television and film industry's Bafta Cymru awards.
Rhys Ifans added a Welsh Bafta to his award at the London ceremony
Also among the winners was actor Rhys Ifans, who last week won best TV actor at the UK Bafta awards ceremony in London.
The ceremony, which was held in Cardiff on Saturday, saw BBC Wales period drama Carrie's War pick up four Bafta masks.
Valleys-based BBC serial Belonging picked up best drama for a record fourth time.
At the Welsh Bafta ceremony, Ifans picked up the Sian Phillips Award for recognition outside Wales.
Last week, he had been awarded a UK Bafta for his portrayal of the late comic Peter Cook in the film Not Only But Always.
After being presented with his Bafta Cymru award at Cardiff International Arena on Saturday, Ifans said: "The English boys gave me one of these last week.
"That was the Triple Crown, this is the Grand Slam."
The annual Bafta Cymru awards are given by the British Academy of Film and Television Arts to reward excellence in film and television.
This year's 14th annual ceremony also saw Ten O'Clock News presenter Huw Edwards won best documentary for his history of religion in Wales, as well as being voted best on-screen presenter.
Huw Edwards picked up two Bafta Cymru awards
Pobol y Cwm star Huw Euron won best actor, with best actress going to Stephanie James for her portrayal of a teenage single mother in the film A Way of Life, which won four awards overall.
Around 600 entries had been received across the 32 categories being judged.
The event, which was hosted by Aled Jones and Dewi Morris, saw period drama Carrie's War triumph in the categories of best design, best costume, best make-up and best original soundtrack.
Another BBC Wales Drama production, May 33rd, won in the best drama for television category.
BBC Wales consumer affairs programme X-Ray won the best magazine feature, while BBC Wales' coverage of the National Eisteddfod in Newport picked up the best live coverage prize.
Best current affairs series went to ITV1 Wales' Wales This Week.
Clare Hudson, BBC Wales' Head of Programmes (English), said: "This has been a great night for BBC Wales and for Welsh TV.
"It's great to see recognition for the quality of our drama - with awards going to a clutch of network and local programmes in both languages.
"The number of prizes going to our factual and cultural output is a credit to the on-screen and production and craft talent who help to make these programmes so popular with audiences."