Society of St Justin
In response to my post about Salisbury Cathedral, Steven sent information about the Society of St Justin which has an apostolate to pray at places that were once used for Catholic worship. An extract:
On visiting a church, monastery, shrine, even if ruined, which had previously been used for Catholic worship recite the following [viz. Pater, Ave, Gloria] for the repose of the souls of all who have worshipped there in the past, especially the priests who faithfully offered the holy sacrifice of the Mass and in reparation for all wrongs committed there. Pray also for the unity of Christ’s church around the See of Peter and for the intentions of our Holy Father