(Portland, OR) -- An intruder broke into The Grotto Monastery Wednesday morning and caused substantial damage. The Grotto Monastery is a private residence for the Servite Friars who minister at The Grotto. The intruder vandalized several rooms, including the chapel and several sacred items. Police arrested the intruder. No one was hurt. The Grotto is a 100-year-old Catholic sanctuary located in Northeast Portland.