Complex sentence: At his request King Devanampiyatissa built Thuparamaya in which was enshrined the collarbone of the Buddha and is considered as the first dagaba built in Sri Lanka, after the introduction of Buddhism.
Split into simpler sentences: At his request King Devanampiyatissa built Thuparamaya in which was enshrined the collarbone of the Buddha. It is considered to be the first dagaba built in Sri Lanka following the introduction of Buddhism.