Gothic architecture is the most ‘public’ manifestation of the period. Giant, mind-blowingly ornate Cathedrals were stationed in major cities. The stained glass and stonework, for instance jam sculptures, all told the holy stories from Abraham through the acts post-Christ saints. These provided a method for anyone visiting and viewing these sites to have a religious experience, however each visitor had essentially the same experience.
More personal techniques did exist at the time – the Moralizing bibles were intensely detailed illustrated texts, and were also incredibly expensive. Nothing else like them existed at the time though, so the owners and readers of such texts were likely in awe of what they saw. This allowed them to absorb the holy stories, and pray etc. without engaging with the throng at the Cathedrals (perhaps this was an anticipation of the Gutenberg bible and the philosophies of the protestant reformation). Another instance of more personal devotional art was the Book of Hours. Thousands of these books were produced that had illustrations and sets of prayers to be recited throughout the day. Here was another way to make the religious practices of Christianity more personal in one’s life.