While I regrettably have very little information to provide to you, these works are simply too good to pass up. What you are looking at are the reliquaries attributed to Fra Diego da Careri (1606-1661), a sculptor and Franciscan friar. The works in question are dated to the second quarter of the 17th century and are located in Naples.
The reliquaries are carved in wood and then stuccoed and gilt with gold leaf. What is particularly impressive to me are the elegance and delicacy of the figures which have a kind of classical serenity to them.
The reliquaries are kept within cupboards called lipsanoteca -- beautiful in their own right.