From OpenStreetMap Wiki
|man_made = campanile|
|A free standing bell tower, typically near a church.|
|Used on these elements|
|Tools for this tag|
|Please use the structured tagging man_made=tower + tower:type=bell_tower. The subtype of the bell tower (campanile, klockstapel, etc.) should be tagged with bell_tower=*.|
A free standing bell tower, typically near a church. It was very popular to build free standing, typical wooden, bell towers for churches up until the 18th century (at least in Sweden).
- wikipedia:Bell tower I'm prey sure this is the same, the differnce seems to be that these "bell towers" are made from stone.