Abstract: The invention provides a memorial assembly (10) including a memorial structure (11) and a security device (16) secured to the memorial structure (11). The security device (16) includes a sensing device for sensing disturbance of the memorial structure (11). The security device (16) also includes a transmitter operatively connected to the sensing device, to generate a wireless alarm signal in response to sensing of disturbance of the memorial structure (11) by the sensing device. The invention also provides a memorial security system which includes the memorial assembly (10) and also a transceiver module which receives the wireless alarm signal and which produces at least one notification message, such as a telephonic text message to prespecified notification address.