If you're a fan of theater productions, make sure you go to a show at Zaqueu de Mello Theater. Book ahead for the best seats in the house.
You'll have no end of sightseeing choices in Londrina Centro. Zaqueu de Mello Theater is a good place to start here, but there are loads of other worthwhile attractions to visit. Catuai Shopping Mall, Universidade Estadual de Londrina, and Ney Braga Park are not far from the arts and culture attraction and will round out your day nicely.