so ive been thru once and gotten most the spots unlocked but where are

bellum : cathedral
scriptorium : archives
mausoleum : necropolis

i finally found the answer
i needed the mini bosses
apparently its all about the room names

theres a list, google it

yea i had found it finally .... didnt say what map tier you had to be in to come across them i dont take the same rooms
ive come across one of the mini bosses and got the unlock i would have figured by now i would have came across the first floor guy