Parts 2 & 3 of Dario Argento's The Three Mothers trilogy. Inferno is classic Argento being a good sequel and companion piece to Suspiria but Mother Of Tears is recent Argento crap featuring laughably bad acting by his daughter Asia.
The original was great for the amount of violence and the second had some good unintentional comedy watching Mario Van Peebles looking like a member of a futuristic Village People as he led a gang of revolutionaries.