A 4.40 krooni Estonian stamp, issued in 2002 to commemorate the 700th anniversary of the granting of Lübeck Law to Rakvere; the Law was effectively a municipal constitution that gave power to a council (Rat) of merchants. The following is from the Estonian Philately site:
On 12 June 1302, King Eric Menved of Denmark granted the Lübeck Charter to the town of Rakvere (German: Wesenberg) in lands then under Danish rule in northern Estonia, giving it the right to independently regulate important aspects of community life.
The stamp features the old aurochs-head coat-of-arms of Rakvere on the background of a 15th century certificate issued by the municipality, with the present coat-of arms shown in the upper right-hand corner.
Many, but evidently not all, cities with Lübeck rights joined the Hansa; there seems to be some discrepancy with regard to Rakvere (or Wesenberg, as it was then known). It clearly had links with the Hansa, but was it a member? Information welcome. Thanks to Trishka for the stamp.
