| Aa-kerk | |
|---|---|
| The Church of Our Lady and St. Nicholas | |
 The Aa-kerk from the East | |
 | |
| 53°12′59″N 6°33′44″E / 53.21639°N 6.56222°E | |
| Location | Groningen |
| Country | Netherlands |
| Denomination | None formerly Dutch Reformed |
| Website | Der Aa-Kerk |
| History | |
| Status | Redundant |
| Founded | 1247 (as a parish church) |
| Dedication | Our Lady, Saint Nicholas |
| Architecture | |
| Architectural type | Church |
| Style | Gothic |
| Specifications | |
| Length | 76 m (249 ft 4 in) |
| Width | 25 m (82 ft 0 in) |
| Height | 76 m (249 ft 4 in) |
| Floor area | 1,155 m2 (12,430 sq ft) |
| Dome height (inner) | 26 m (85 ft) |
| Materials | Brick |
The Aa-kerk (also: A-kerk) is a historic former parish church in the centre of Groningen, and a dominant feature in the skyline of the city together with the nearby Martinitoren.