The Gibraltar – Luxembourg 2019 Joint stamp issue shares the common topic “Defensive tunnels”. The Gibraltar stamp features an external view of the Rock’s Great Siege tunnels as seen from Princess Anne’s Battery. The illustration featured on the stamp was created by a well-known sketch artist and architect residing in Luxembourg, Mr Arnaud De Meyer. Luxembourg’s stamp features an external view of the Bock Casemates tunnels which forms part of the “Gibraltar of the North” fortifications in Luxembourg and has also been illustrated by Mr De Meyer.
