12th-13th Century Gotland Sweden Pfennig

It's snowing, so it seems like a good time to post coins from Sweden.

I was excited to pick up this Gotland Pfennig early last year that dates to between 1140 and 1270 AD. It is now my earliest Swedish coin, handily beating out my 15th Century Örtug, described in more detail here:

http://goccf.com/t/336909

On the obv, there is a wheel with a star and a largely clipped or worn away retorgrade legend of SIEW. On the rev, there is a cross-hatched structure with a gabled roof and two towers (not really visible on this specimen). Some examples have a window of various shapes, but mine appears to be of the type without one. It is attributed as Lagerqvist XXAb and Gullands Mynter #1. I believe that this is only the second example of a medieval coin in my collection that is the first one listed in a numismatic book.

While the island Gotland is firmly under the Swedish flag these days, according to wikipedia this has not always been the case. Gotland and its port city of Visby wielded significant power in the medieval period. As I understand it, the positive business impact of the island to the kingdom meant that it was largely left to its own devices. However, soon after this coin was minted, the Swedish King quashed a civil war between the Germanic merchants in Visby and the peasants in surrounding island districts.