and 6:00 pm and before church services. In 1949, after many building alterations, the Casavant organ was installed. Constructed partially of war surplus parts and remnants of the Wurlitzer, the instrument served well but had a problematic history. In 1971, the church membership voted to demolish the building and replace it with a hi-rise tower complex designed by Arthur Erickson. The redevelopment was opposed by the public and in 1976 after much lobbying; the cathedral was named a Class A Heritage building in the municipality of Vancouver and the Province of British Columbia. In 1995, an eleven-year program of restoration and renewal was begun. Christ Church Cathedral is the Regimental Church of the Seaforth Highlanders and is in the process of being designated Regimental Church of the BC Regiment, Duke of Connaught's Own. Bishop Michael Ingham authorized a liturgy for the celebration of lesbian and gay covenants in December 2002. Christ Church Cathedral's Annual Vestry meeting in February 2003 gave approval for the ministry to be offered as part of the parish's pastoral care for the community. The spring and fall of 2004 saw the installation of a Kenneth Jones tracker organ in the south gallery of the renovated cathedral. Comprising a three manual console and 2500 pipes, 1700 salvaged from the Casavant, it is the first Christ Church Cathedral organ custom built to speak with optimum effect in the sanctuary. On September 25, 2014, the parish submitted "A Statement in Favour of the Solemnization of Same Sex Matrimony in the Anglican Church of Canada" to the Anglican Church of Canada's commission on the marriage canon. This statement was submitted by the cathedral's clergy, wardens and parish council. Worship Holy Communion is celebrated using both the Book of Common Prayer and the Book of Alternative Services. Both a simple spoken celebration and a choral or sung Eucharist celebrated with congregational hymns featuring an eclectic mix of Mass settings, psalmody, anthems and instrumental music are practised. Music in worship ranges from plainsong to motets from the baroque and classical periods to contemporary and world music. Cathedral musician Rupert Lang is a prolific and respected composer and many of his sacred pieces debut during this liturgy. The cathedral clergy share preaching duties at services with guest preachers booked throughout the year. Guest preachers in the recent past have included a former Archbishop of Canterbury, Robert Runcie, and the noted environmental scientist David