“Stup” seems to be a misspelling of “stupa.”

• English meaning: stupa is a dome-shaped shrine or memorial monument.
• In Jainism: a stupa is a devotional monument or reliquary mound that commemorates tirthankaras and important events; it marks a sacred place and is a site for worship and pilgrimage.
• Traditions: the basic idea of a stupa is common to both Digambara and Śvetāmbara Jain practices, though local uses and stylistic details may vary.

If you meant a different term, tell me the exact word and I’ll explain it in Jain context.