The Belfast Agreement.
On 23 May of the same year the Agreement was endorsed by the majority of voters in Northern Ireland at an election. On that same day, Irish voters in the Republic of Ireland voted separately to change their government’s constitution in line with what was agreed at Stormont. The Democratic Unionist Party (DUP) was the only large political group that opposed the Agreement at that time. The Agreement entered into law on December the 2nd in the following year 1999.
The agreement basically agreed to power sharing between parties, a rejection of violence to achieve political ends, more equality in policing and jobs and a release of all paramilitary prisoners..and so Belfast’s tourist and economic boom began.