While plenty of smaller projects are still underway, the grand opening of the University of Connecticut’s new branch campus Wednesday means for the first time in about a decade and a half, there is a lull in major redevelopment downtown. Though it evolved over time, the bulk of it ultimately became what is now known as Adriaen’s Landing and the Front Street District, a nearly $1 billion investment over 15 years that led to the construction of the Connecticut Convention Center, Science Center, a new retail district, housing, parking and – most recently – the new UConn campus.