Don't know how old your question is, but I know the first part.
'Penitentiam agite appropinquabit enim regnum coelorum' means 'Do penance, for the realm of heaven is approaching'. It is the base for the quote 'Penitenziagite' in the book and film 'The name of the rose' and 'Penitentiam agite' was the name of a band in Rotterdam, The Netherlands, from 1992 through 1996. You still see other bands with that name nowadays.