An office tower on Miller Street in Manchester is completely covered in solar panels. They are used to create some of the energy used by the insurance company inside. When the tower was first (26)_______ in 1962,it was covered with thin square stones. These small square stones became a problem for the building and continued to fall off the face for 40 years until a major renovation was (27)_______. During this renovation the building 's owners, CIS,(28)_______the solar panel company, Solarcentury. They agreed to cover the entire building in solar panels. In 2004,the completed CIS tower became Europe 's largest (29)_______ of vertical solar panels. A vertical solar project on such a large (30)_______has never been repeated since.