The Cathedral Church of Our Lady of Good Aid, popularly known as Motherwell Cathedral, is a Roman Catholic cathedral located in Motherwell, North Lanarkshire, Scotland. It is the seat of the Bishop of Motherwell, and mother church of the Diocese of Motherwell. Church of Our Lady of Good Aid, Motherwell was opened on Monday 9 December 1900. In 1948, the church was elevated to the status of cathedral after the new Motherwell Diocese was erected as a suffragan see by the apostolic constitution Maxime interest. The Scottish Catholic Directory of 1901 includes in the list of events for the year 1899-1900 the "Opening of the Church of Our Lady of Good Aid, Motherwell" on Monday 9 December 1900, the feast of the Immaculate Conception transferred from Sunday. It includes a description of the church's dimensions and principal architectural features. The cathedral was designed in the Gothic revival style by the celebrated architects Pugin and Pugin and resembles many Catholic churches designed by them in Scotland, England and Ireland. The church originally had a high altar and two side altars. However, these and much of the ornate decoration were lost in the re-ordering of the sanctuary in 1984 in accordance with the reforms of the Second Vatican Council.