Not to rehash these questions:
Should history questions be on topic?
What are the limits on history/historical questions?
Are questions on what Christians have done in history on-topic?
But in refocusing to be Christian-Doctrine-and-Biblical-Basis.SE have we ignored the limits we previously set on Historical questions?
Furthermore, why shouldn't questions related to Christian prayer be on topic. I'm hoping no one would suddenly decide that these:
Praying the Liturgy of the Hours in private; out loud
What is the Little Office of Our Lady in connection to the Scapular Devotion?
Should the words to prayers said in private be changed to fit the company?
would be off topic.
Can we add,
Prayer (as it pertains to common worship, not pastoral advice),
History (as it pertains to the development of the Church)
and even maybe Art (as it pertains to analysis and context, not just opinion) to the list of on topic things?