Abbey Church of St. Mary the Virgin

The second largest parish church in England, this former Benedictine monastery was founded in 1092. G.G. Scott renovated parts of the building in the 19th century.

The east window of the Norman (or apsidal) Chapel in the south transept was walled up in 1887 and now contains a Salviati mosaic of Christ enthroned, holding a book in one hand and giving a blessing with the other.

The Norman Chapel circa 1900.

 

In 2012.

An anonymous donor funded the mosaic, which was installed in either 1893 or 1897.

Sources:
Wikipedia
The Project Gutenberg EBook of Bell's Cathedrals: The Abbey Church of Tewkesbury, by H. J. L. J. Massé, 1906. 69.
Tailer Family's flickr Photostream
Wendy Redrobin's flickr Photostream
St. Mary the Virgin