Artist Birthday Quiz for 3/25~

What sculptor, before beginning his most famous monument, worked on a high- relief carving in Georgia which was eventually completed by other artists?

What artist joined forces with Olivier Mosset, Michel Parmentier, and Niele Toroni to form BMPT, a Paris-based late modern art group?

Answers here~ https://schristywolfe.com/2015/03/25/march-25/