It is one of the best preserved Saxon forts and its lofty position on the south coast made it a perfect part of the defence strategy for the Solent for hundreds of years.
Over the years the castle has also been a favourite with historians and re-enactments, which regularly take place within the stone walls.
Here are some of our favourite memories of Portchester Castle.
MORE RETRO: Portsmouth 100 years ago | Lost Portsmouth shops you probably forgot existed | The Pyramids pool
Join our new Portsmouth Retro Facebook group to find more fascinating photos and memories from Portsmouth’s past.
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