The Hidden Gem
| Church of St Mary, Manchester | |
|---|---|
| Shrine and Parish Church of St Mary, Manchester | |
Exterior of the Church of St Mary 'Hidden Gem', Mulberry Street, Manchester  | |
| 53°28′49″N 2°14′47″W / 53.48028°N 2.24639°W | |
| Location | Manchester | 
| Country | England | 
| Denomination | Roman Catholic | 
| Website | St Mary's | 
| History | |
| Status | Active | 
| Dedication | Our Lady of the Assumption | 
| Consecrated | 1848 | 
| Architecture | |
| Functional status | Active | 
| Heritage designation | Grade II* listed | 
| Designated | 18 December 1963 | 
| Architect(s) | Richard Lane M. E. Hadfield  | 
| Architectural type | Church | 
| Style | Italian, Norman, Gothic and Byzantine | 
| Years built | 1844–48 | 
| Specifications | |
| Number of domes | 1 | 
| Materials | Stone and brick | 
| Administration | |
| Province | Province of Liverpool | 
| Diocese | Diocese of Salford | 
| Deanery | St Ambrose Barlow (South Manchester)  | 
| Clergy | |
| Priest(s) | Rev. Mgr Canon A. Kay | 
The Hidden Gem, officially St Mary's Catholic Church, is a church on Mulberry Street, Manchester, England. The parish dates back to 1794, with devotion to St Mary, Our Lady of the Assumption, and the present church, rebuilt in 1848, is a Grade II*-listed building which includes the Diocesan Shrine of Our Lady of Manchester.