Over the next several posts, we’ll look at general principles (288-294), the arrangement of the sanctuary (295-310) and the nave (311-318)
288. For the celebration of the Eucharist, the People of God are normally gathered together in a church or, if there is no church or if it is too small, then in another respectable place that is nonetheless worthy of so great a mystery. Therefore, churches or other places should be suitable for carrying out the sacred action and for ensuring the active participation of the faithful. Moreover, sacred buildings and requisites for divine worship should be truly worthy and beautiful and be signs and symbols of heavenly realities.*
*Cf. Sacrosanctum Concilium 122-124; Presbyterorum Ordinis 5; Inter Oecumenici 90: Eucharisticum Mysterium 24; Canon Law 932 §1.
The Church keeps tight tabs on this for the Sacrament of Marriage. Less so actually for the Eucharist. (Think homes, athletic venues, campgrounds, and the like.)