The city of Liverpool is to hold two minutes silence at noon on Saturday to pay tribute to Ken Bigley, who has been killed by kidnappers in Iraq.
A man signs the book of condolence in front of a poster of Mr Bigley
Books of condolences have been opened and city leaders have paid their respects to Mr Bigley's family.
Lord Mayor Frank Roderick said "Our hearts go out to them."
"They have shown exceptional fortitude, bravery and determination during the last 23 days."
Books were opened in the City Hall and the city's Roman Catholic Cathedral, which stayed open until 2100 BST on Friday for a city in grief.
One visitor who signed a book, Joanne Collins of Chester, said she could not believe an innocent man had been killed.
"In a way if he had to have been killed I wish for his sake and that of his family they could have done it straight away," she said.
"It's so cruel to have put his mum and his brothers through all this suffering."
Another, Sarah Bennett, from Toxteth, said she believed Prime Minister Tony Blair was right not to have negotiated with Mr Bigley's captors.
"It might sound harsh but if you pay money once to get someone released then the terrorists will really hold the country to ransom."
Councillor Roderick has called for the city to observe two minutes silence at 1200 BST on Saturday.
City council leader Mike Storey described it as a "tragic
day" for the Bigley family, Liverpool and "everyone who prayed and hoped for Ken's release."
"Our thoughts are with Ken Bigley's family in this dark hour. They have remained brave, strong and resolute throughout this ordeal, never losing hope.
"There are no words to describe their terrible loss, but the people of the city will unite in offering our prayers and support for them at this difficult time.
"Just as we were united as a city to pray for Ken's release, so we will unite as a city in mourning."
Archbishop Patrick Kelly, the Roman Catholic Archbishop of Liverpool, who celebrated Mass in the Metropolitan Cathedral for Ken Bigley on Friday evening, said he expected the city to give massive support to the Bigley family.
"Nobody is going to say I know what you are feeling - we are too wise for that.
"We will simply say we are alongside you in silence and in sorrow."