People across Wales have stopped for a two-minute silence to remember the victims of last week's London bombings in which more than 50 people died.
The silence observed in Cardiff, Aberystwyth and Wrexham
First Minister Rhodri Morgan led the silence on the assembly steps.
Prince Charles and the Duchess of Cornwall marked the silence on a visit to the Vale of Glamorgan, south Wales.
The Archbishop of Canterbury Dr Rowan Williams, in Aberystwyth, said there was a danger of young people being caught up in the "drama of extremism".
Shoppers in the centres of Swansea, Carmarthen and Wrexham joined in the tribute at 1200 BST and in offices and factories around the nation workers also fell silent.
'Lack of humanity'
A number of Welsh towns and cities, including Cardiff and Swansea, have already opened books of condolence to remember those killed in the underground and bus attacks exactly a week ago.
The silence was observed at both the Guildhall and County Hall in Swansea and people also gathered at the city's Castle Square.
Prince Charles and Duchess of Cornwall join the silence in the Vale of Glamorgan
Ahead of the tribute, Swansea's lord mayor Mair Gibbs said the show of solidarity "would send a strong message to the terrorists that the people of Britain will not be cowed by their lack of humanity".
Carmarthenshire Council had urged staff and residents across the county to take part in the silence
Shoppers in Wrexham's Queens Square joined civic leaders in silence when an air raid siren sounded the start of the two-minute tribute.
Posters about the commemoration have been put up at a number of railway stations and Arriva Trains Wales said an announcement would be made at the busiest stations.
Fishermen join the two-minute silence at the breakwater in Swansea
Meanwhile, the prince, who is on a three-day Welsh summer tour, has called on Britain's Muslims to condemn the attacks.
In an article in the Daily Mirror he said the silent tribute was also a chance "to remember and reflect".
The Archbishop of Canterbury led a two minutes silence at a graduation ceremony at Aberystwyth University.
Dr Williams, who was being awarded a fellowship, said afterwards of the bombings: "I feel we might have seen it coming and in a way we did at some time, but it was impossible to predict.
"London goes on as usual with great courage and calm."
"The anxiety, of course, is the knowledge that it seems that it is British-born people who are responsible and it's just a reminder that terrorism does not know any boundaries."
Dr Williams added: "It's no easier to explain than it is in any other country in the world.
"It seems to be some younger members of these communities will, for whatever reason, get alienated from their own religious communities in this country.
"Sometimes they go abroad, as seems to have happened, and get caught up up in the drama of extremism and they come back and it's this drama of extremism which is the danger.
"There's so little of it here, in other parts of the world it seems to be almost routine, that's the tragedy."