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Which castles did Edward I build in Wales after conquering Gwynedd?

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After conquering Gwynedd, Edward I implemented a strategic program of castle building to secure his authority in Wales. The most significant structures erected as part of this effort include:

These fortifications were central to the "Edwardian settlement," as each castle was designed to shelter a borough where English colonists were settled to maintain control over the region. Together, these sites represent a major architectural legacy of his reign and were collectively designated a UNESCO World Heritage site in 1986.12