St Mark's Chapel, Baska, Croatia

"When you come to across a small chapel of St. Mark's in Baska, you are, in fact, in an unavoidable spot of the topographic map, of the early Christianity. Lowering your gaze into the under-church you discover at least a millennium older architectural remains of the setting of initiation into Christian religion and community by the inhabitants of Baska, their Baptistery."

"We know this because of a high degree of preservation since the first half of the 5th century, as we preliminarily date it, up to present days, with the church of St Mark's constructed over it having played a significant protective role."

Quoted directly from the information board posted outside.