MAP - Mercator, Cartography museum in Sint-Niklaas, Belgium.

The Mercatormuseum in Sint-Niklaas is a collection of maps, globes, and instruments that show how people represented the Earth over many centuries. The exhibits move from early methods through to the modern techniques used in mapping today.

The Mercator collection has been assembled since the 19th century by the Koninklijke Oudheidkundige Kring van het Land van Waas and was shown from 1911 in Huis Janssens, bought by the city. In 1962 it received its own Mercatorzaal behind that house. The museum reopened on 26 March 1994, four hundred years after Mercator's death, with a new department of modern cartography in cooperation with the Nationaal Geografisch Instituut. After renovation from 3 April 2023, the building reopened in December 2025 as MAP-Mercator.

The museum's name refers to Gerardus Mercator, who was born in Flanders but worked in Leuven and Duisburg, not in Sint-Niklaas. The collection itself has been assembled since the 19th century by the Koninklijke Oudheidkundige Kring van het Land van Waas, and since 1911 it has been shown in Huis Janssens. The two 16th-century Mercator globes, one terrestrial and one celestial, are recognised as Flemish Masterpieces.

The museum has interactive screens and animations explaining how cartography developed and how it works. Visitors can explore firsthand how old and new mapping methods produced different results.

The museum holds two rare globes from the 16th century that represent masterpieces of Flemish cartography. These objects show how carefully craftspeople then depicted the world in fine detail on spherical surfaces.