Begun around 1088, the university in which northern Italian city is considered the oldest in Europe?

Beginning near Tampa Bay in 1539, which explorer led the first European expedition to see the Mississippi River? Beginning service in 1832, which city's first streetcar was a horse-drawn car running along the Bowery? Beginning with 1970's "Get Yer Ya-Ya's Out!", which group had a top-10 album every year of the 1970s except 1979? Which singer-songwriter scored her first No. 1 pop hit in 1990 with "Vision of Love"? Which religion, founded around 1500 by Guru Nanak, has elements in common with Hinduism? Begun around 5,000 years ago, Stonehenge's construction belongs to which "New Stone Age" period? Which company, begun by a retired minister in 1876 to make socks for lumberjacks, soon expanded into underwear? Which war began with Frederick the Great's invasion of Saxony and lasted from 1756 to 1763?