"Dating back to the early 13th century, when Vikings established their headquarters here, this medieval structure stands as a relic of British rule over Ireland. Today the well-preserved estate offers a glimpse into the way previous generations lived and hosts exhibits on art, fashion, and other Irish history artifacts. Tickets for guided tours are recommended, especially if you're eager to see the interior apartments and historic quarters. Whether or not you're headed to the Irish countryside to see Game of Thrones –style castles , the Dublin Castle is a must-see." - Melissa Kravitz Hoeffner
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