Domus mea domus orationis vocabitur
Today's Gospel describes Our Lord's cleansing of the Temple in St Mark's Gospel. Our Lord reminds the buyers and sellers that 'My house shall be called a house of prayer' - which is the motto of the Oratory: Domus mea domus orationis vocabitur.
You can watch Friday's Mass here.
This is Luca Giordano's fresco of the cleansing of the Temple, painted on the counter-façade of the Naples Oratory: