Statue of Constantine The Great the first Roman emperor to convert to Christianity, York Minster City of York, North Yorkshire

Capturing methane from an old land fill rubbish dump on Walney Island near Barrow in Furness to convert to green electricity, Cumbria, England, United Kingdom, Europe

Capturing methane from an old land fill rubbish dump on Walney Island near Barrow in Furness to convert to green electricity, Cumbria, England, United Kingdom, Europe

Detail of a photovoltaic system, solar panel, solar cells

Coal-fired power plant, Kiel, Schleswig-Holstein, Germany, Europe

Coal-fired power plant, Kiel, Schleswig-Holstein, Germany, Europe

Historical characters on a wall in Berlin, Germany, Europe

Ostuferhafen harbor with cargo terminals and coal power station at night, Port of Kiel, Schleswig-Holstein, Germany, Europe

Power station, Kiel, Schleswig-Holstein, Germany

Convert Durnstein, Wachau Region, Lower Austria, Austra

Stift Ardagger convert, Ardagger, Mostviertel region, Lower Austria, Austria, Europe

Convert Duernstein, Wachau Region, Lower Austria, Austria

Convert Durnstein, Wachau Region, Lower Austria, Austra

Convent Altenburg, Waldviertel Region, Lower Austria, Austria

Altar of the Convert in Duernstein, Wachau Region, Lower Austria , Austria

Reykjavik, Harpa, the new convert hall and conference center (inaugurated in 2011). The buidling is considered to be one of the new architectural icons of Iceland. europe, northern europe, iceland, February

Reykjavik, Harpa, the new convert hall and conference center (inaugurated in 2011). The buidling is considered to be one of the new architectural icons of Iceland. europe, northern europe, iceland, February

Peruvian Pentecostal convert Calixta Cruz stands with child in her doorway in Angostura. Cruz drew an abusive husband into the church after her conversion. This image is part of a five-part series on the rise of evangelical Protestantism in Latin America.