The Hop on Hop off bus worked particularly well in Tallinn. It picked us up right at the dock and took us to all the places we wanted to see. In Tallinn, they are quite spread out. We first stopped at Kadriorg Park and Palace, then remounted the bus for a ride through the further areas of interest such as the ruins of St. Bridget's Priory. We just did a "drive-by" for those areas, and then arrived back in the Old Town where we had lunch and explored the Lower Town and the Upper Town. We had from 9 AM until 5:30 PM which was plenty of time for visiting all these places.
As we arrived in Tallinn a band, dressed in blue uniforms, greeted us, making us feel so welcome. We were the first cruise ship of the season, so I'm sure, in many ways, they were happy to see us.
Tallinn has a population of about 400,000 which is a third of the total Estonian population!
Tallinn was another of the member cities of the merchant Hanseatic League, founded in 1329 in Lubeck (Germany).