PUC-Rio, Pontifical Catholic University of Rio de Janeiro, is the university in Rio de Janeiro, Brazil, responsible for creating the Lua language.
From the lua.org About page:
Lua is designed, implemented, and maintained by a team at PUC-Rio, the Pontifical Catholic University of Rio de Janeiro in Brazil. Lua was born and raised in Tecgraf, formerly the Computer Graphics Technology Group of PUC-Rio. Lua is now housed at LabLua, a laboratory of the Department of Computer Science of PUC-Rio.