In 1661 he was invited to work on the fortifications of the harbour at Tangiers and, although he turned down this request, it is interesting to realise that even in 1661 Wren was considered someone who might take on a major architectural project.
Sa 1661 siya ay iniimbitahan na trabaho sa fortifications ng silungan sa Tangiers at, kahit na siya nabuksan down ang hiling na ito, ito ay kagiliw-giliw na realise na kahit sa 1661 Wren ay itinuturing na isang tao na maaaring gawin sa isang malaking architectural proyekto.