European Urban Summer School discusses lessons from public-private partnerships (PPPs) in Ireland. PPPs evolved over three phases from 1986-2008: starting with tax incentives to spur development during economic decline, expanding to urban renewal projects like Temple Bar and the IFSC in the 1990s, and relying heavily on the PPP model for major infrastructure during Ireland's Celtic Tiger boom in the late 1990s-2000s. However, the financial crisis exposed weaknesses like over-reliance on private financing and complex legal structures, highlighting challenges with the PPP approach.