The University of Notre Dame, best known for the Fighting Irish, is taking on an off-field conflict, this one involving money. And art. Smarting from a new federal endowment tax being imposed on wealthy private colleges, university officials say the levy will siphon money not only from financial aid and research but also from the school’s renowned art museum. Notre Dame’s Snite Museum of Art is a local gem with a collection of 29,000 works from Rembrandt to Rodin. Free to the public, it offers lectures, concerts and a summer apprentice program for high school students.