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Modern exploration of Thracian cave sanctuaries has revealed extensive evidence of their use. Pottery fragments dating from archaic through Roman periods show continuous ritual activity spanning centuries. Some caves contain thousands of sherds—deliberately broken vessels, their contents poured as libations before the pottery itself was smashed and left as permanent offering.
Coins found in caves span wide chronological range, some predating Roman conquest, others from late imperial period, suggesting the sanctuaries remained active even after official Christianization. The coin deposits are not random losses but intentional placement—wedged into cracks, arranged in patterns, sometimes accompanied by inscriptions dedicating them to specific deities.
Animal bones, primarily from domesticated species (sheep, goats, cattle), indicate sacrifice occurred in or near the caves. The bones often show evidence of burning, suggesting at least part of the animal was consumed in ritual fire. In some cases, complete articulated skeletons of small animals were found, possibly sacrifices or offerings left intact rather than eaten.
Bronze objects—fibulae, rings, small figurines—appear in cave deposits, often in excellent preservation due to the stable environment. Some of these objects show deliberate damage, bent or broken before deposition, perhaps destroying their utility to make them permanently sacred rather than potentially recoverable treasure.
Inscriptions carved into cave walls or on portable stone tablets found within chambers provide names—deities invoked, worshipers recording their presence, dedications accompanying offerings. The languages vary—Thracian, Greek, Latin—reflecting the cultural changes that occurred over centuries while the sanctuaries remained in use.
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