The economy of Belfast, Northern Ireland was initially built on trade through Belfast Harbour. Later, industry contributed to its growth, particularly shipbuilding and linen. At the beginning of the 20th century Belfast was both the largest producer of linen in the worldand also boasted the world's largest shipyard.Civil unrest impacted the city's industry for many years, but with the republican and loyalist ceasefires of the mid-1990s, Good Friday Agreement and the St Andrews Agreement in 2006, the city's economy has seen some resurgence once again.