panel of the oculus is a depiction of the Blessed Sacrament symbolizing the resurrection of Jesus Christ. Underneath the stained glass window is an intricate wooden reredos with gold and green detailing. Restorations The exterior of the cathedral has remained relatively unchanged over the last 100 years. In 1864, the Toronto firm Gundry and Langley added an enlarged sacristy to the cathedral. In 1866, the same firm was also responsible for the addition of the tower and spire which adorns the west entrance of the cathedral. In 1880, the current three-manual pipe organ was installed in the cathedral's gallery by Archbishop Joseph Lynch. The dormered windows located on the roof were added some time in the 1890s with the intent to improve the cathedral's appearance; it is believed that architect Joseph Connolly was responsible for their design. The interior of the building has remained the same in terms of its plan; however, since the Second Vatican Council, the original high altar was dismantled and used to create a new tabernacle shrine, now located to the south of the sanctuary, while a new table altar was placed in the centre of the sanctuary. Most of the present paintings that adorn the roof and walls of the cathedral date to 1937, with several smaller ones having been added since, the most recent in 1982. To the right of the altar, there is a wooden monument for the Blessed Sacrament that is the result of a re-design of 1980 directed by Gerald Emmett Cardinal Carter. In 2011, restorations took place that included the west facade being cleaned, bringing the bricks back to their original yellow colour. In June 2015, it was announced that the 168-year-old cathedral would be closing for the next nine months to deal with safety concerns over a long-running restoration process. St. Paul's Basilica planned to add three weekend Masses to accommodate parishioners from St. Michael's. The cathedral was slated to open briefly in December 2015 for Christmas masses before closing again until March 2016. Concrete pillars replaced existing ones after it was discovered that mortar was failing. The original pipe organ and the balcony which supported it were replaced with a new balcony constructed which supports a new pipe organ and additional seating for 250 more parishioners. In August 2015, emergency crews had to retrieve a woman who had climbed the exterior scaffolding. On December 8, 2015, the archdiocese