St John the Evangelist - Duncan Terrace, Islington, London, UK - UK Historical Markers on Waymarking.com

The oval plaque, made from grey slate, reads:

Blessed on the first of July 1993

by
His Eminence
Cardinal
Basil Hulme OSB
to commemorate the
150th anniversary
1843 - 1993

of the opening of this Church

The church is a Grade II listed building and the entry at the English Heritage website [visit link] tells us:

"Roman Catholic church. 1841-43 by Joseph John Scoles, the towers slightly later, with a new roof of c.1901, and the interior re-ordered in 1964 and 1973. Red brick set in Flemish bond to Duncan Terrace, yellow brick behind, stone dressings, roof of Welsh slate and lead. Nave, apsidal chancel, and side chapels in the place of aisles, all under a single roof. Neo-Romanesque in style. Principal gabled front to the east, flanked by towers. Central, round-arched, portal with two Caernarvon-arched doorways; three round-arched windows at gallery level with sill- and springing-bands; wheel window in the gable. The south tower is divided into three stages, the first and second flanked by engaged columns; the first stage has a single round-arched portal with Caernarvon-arched doorway; the second stage has two round-arched windows one above the other; the third, belfry stage stands detached above the body of the building, with round-arched openings flanked by brick pilasters, and eaves cornice of oversailing brick, to each side; pyramidal roof of lead. The north tower follows the same design except that it is higher, having a short third stage of blank brick arcading, and then a fourth, belfry stage with two round-arched openings and eaves cornice in the form of machicolated brickwork; broach spire of lead. The simple interior continues the Neo-Romanesque theme with round arches with engaged columns and stiff-leaf capitals between the nave and side chapels, and between the nave and the apsidal chancel, and a similar arcade to the clerestory; later roof of hammer beam construction."