THE tricolour was today flying at half mast over government buildings in Dublin as a mark of respect following the death of Queen Elizabeth.
The flag was also lowered above Leinster House, Dublin City Council and at Cork City Hall.
The move came as a a number of books of condolence were opened in the Republic to mark the 96-year-old's passing.
While a Book of Condolence was opened at the British Embassy in Dublin, the city's Mayor Caroline Conroy also opened an online book for people who want to extend their sympathies.
The book will remain open until September 19 and all messages of sympathy will be printed and forwarded to the British royal family.
Ms Conroy said: "On behalf of the people of Dublin, I would like to extend my sympathies to the British Royal family and the British people on the passing of Queen Elizabeth to whom she gave such loyal service for many decades.
"Her dedication to duty and public service were undeniable and her knowledge, understanding and experience truly unique".
The book is available to sign at https://consultation.dublincity.ie/lord-mayor/book-of-condolence-hrh-queen-elizabeth/
Cork City Council said Mayor Deirdre Forde was also due to open a Book of Remembrance with Galway also expected to follow.
In Belfast, a Book of Condolence opened at city hall, will remain available until the day of the funeral.
The Garden of Remembrance will also be open for anyone wishing to lay floral tributes.
Elsewhere, books were opened at Lagan Valley Island and at Dundonald Ice Bowl.
Mid and East Antrim Borough Council also announced a list of memorials where floral tributes could be laid. These include the Carrickfergus, Whitehead and the Knockagh Monument.
