Large bonfires are to be set alight this evening across Northern Ireland ahead of the July 12th.
The 'Eleventh Night' traditionally marks the start of the commemorations of the Protestant King William III's victory at the Battle of the Boyne in 1690.
The huge wooden pallet structures have been under construction for a number of days, with large crowds expected to attend.
Last year a number of residents living on Chobham Street in Belfast had to be evacuated from their homes for protection from a massive bonfire in the area.
A bonfire under construction near Chobam Street, Belfast | Image: Brian Lawless / PA Wire/Press Association Images
A completed bonfire in the Hopewell area in the Lower Shankill | Image: Brian Lawless / PA Wire/Press Association Images
A total of 18 Orange Order parades will take place across Northern Ireland tomorrow to mark 'The Twelfth'.
In Belfast the parade will begin at 10am and travel a six-mile route through the city. It is traditionally the longest of all the demonstrations and will feature up to 60 bands.
Flagship parades will take place in Portadown and Kilkeel. 5,000 members are expected to walk in the Portadown parade, which begins at 10.15am.
Men construct a bonfire in the Ballymacash area of Lisburn | Image: Brian Lawless / PA Wire/Press Association Images
The Police Federation for Northern Ireland (PFNI) has appealed for 'spirit of Euro 2016' over the Twelfth period.
PFNI Chairman Mark Lindsay commended the Northern Ireland and Republic of Ireland fans for their outstanding behaviour and would now like to see the same approach taken to the parades.
"The officers I represent want nothing more than a trouble-free Twelfth where they are not the target for people who have little or no respect or understanding for the job that they do.
"We don’t want to see officers hurt in the execution of their duties. Neither they nor the wider community, of which they, too, are a part, wants unrest and disorder.
"Euro 2016 demonstrated that it can be done, and done well," he added.
"Let’s see that spirit replicated with the men and women of the PSNI given the respect they deserve for a difficult and demanding job."