I love old photographs of liturgical events NLM had these three of Solemn Mass in the Premonstratensian rite from the Norbertine Abbey of Frigolet near Avignon. The photographs date to around the mid 1950's.
Now my immediate predecessors were Premonstatensian Canons, their liturgy here wasn't anything out of the ordinary, and certainly didn't reflect the past glory of their own Rite. One of the ancient features that would have filled any "liturgist" of the present day with horror was celebrating solemn Mass in the presence of the Blessed Sacrament exposed. On the Feast of Corpus Christi for example Benediction took place three times; before the collect, at the offertory and before the post communion.
Their Rite apparently closely resembled that of Cluny, and was perhaps one of the most exotic of Western Liturgical Rites.
I would like to claim that my people were so attached to this particular Rite, and to deprive them would be a grave pastoral disservice, therefore I should be given permission to celebrate it but I can't see anyone wearing that, but their Rite is illustrative of the rich diversity of the liturgies of the past.