Complex sentence: Originally, the statue "Golden Eagle" was made from copper with golden alloy around it and its pedestal from jade by sculptor Viktor Mitroshin, but later altered by the Spanish company Carrera y Carrera, based in Madrid.
Split into simpler sentences: Originally, the statue "Golden Eagle" was made from copper with golden alloy around it and its pedestal from jade. It was created by sculptor Viktor Mitroshin, but later altered by the Spanish company Carrera y Carrera, which is based in Madrid.