What is "martinitoren"

The Martinitoren (; Martini or St. Martin's Tower) is the highest church steeple in the city of Groningen, Netherlands and the bell tower of the Martinikerk.

The tower is located at the north-eastern corner of the Grote Markt (Main Market Square). It contains a brick spiral staircase consisting of 260 steps, and the carillon within the tower contains 62 bells. The tower is considered one of the main tourist attractions of Groningen and offers a view over the city and surrounding area. The front of the tower shows three pictures above the entrance: the blind poet , Saint Martinus and Rudolf Agricola. All three are men are linked to the history of Groningen. The tower is tilting about 0.6 m, according to reports the tower has a foundation of only three metres deep. The citizens of Groningen call their tower d'Olle Grieze, meaning the old grey one in the local dialect.