Dual Cypher of Gustaf Adolf and Sibylla of Sweden
<a href="//commons.wikimedia.org/wiki/User:Glasshouse" title="User:Glasshouse">Glasshouse</a>
CC BY-SA 2.5
<a rel="nofollow" class="external autonumber" href="http://www.kungahuset.se/hovstaterna/kungligastiftelser/ytterligarestiftelser.4.1dd8664104bee0ce6e80001829.html">[1]</a>