 Plymouth has about 150 churches and its Roman Catholic cathedral ( 1858 ) is in Stonehouse . The city 's oldest church is Plymouth Minster , also known as St Andrew 's Church , ( Anglican ) located at the top of Royal Parade — it is the largest parish church in Devon and has been a site of gathering since AD 800 . The city also includes five Baptist churches , over twenty Methodist chapels , and thirteen Roman Catholic churches . In 1831 the first Brethren assembly in England , a movement of conservative non @-@ denominational Evangelical Christians , was established in the city , so that Brethren are often called Plymouth Brethren , although the movement did not begin locally . 
