white marble plaque attached to a rough, textured wall

white marble plaque attached to a rough, textured wall. The plaque has black lettering that reads "IN COMMEMORATION OF THE SILVER JUBILEE OF ST. JOSEPH'S CATHEDRAL MERU 10TH SEPTEMBER, 1985-10TH SEPTEMBER, 1986 GRATITUDE FOR SPIRITUAL FAVOURS PROSPERITY IN THE SPIRIT OF 43rd EUCHARISTIC CONGRESS." The plaque is located on the exterior wall of St. Joseph's Cathedral in Meru, Kenya, at the coordinates 0.052° N, 37.649° E. The wall is made of irregular stone blocks.