Paulo César da Silva Barrios (born 1 February 1980) is a Paraguayan footballer who plays for Libertad in Paraguay, as a centre back.
He has previously played top-flight football in Paraguay, Italy, Argentina, England and Spain.
He has played for the Paraguay national football team since 2000 and is their most-capped player of all time, earning over 100 caps.
He played at two World Cups and three Copa América tournaments, helping his country finish as runners-up in the 2011 Copa América.