| Penwortham Castle | |
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| Penwortham, Lancashire in England | |
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The motte
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Location in the Borough of South Ribble
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| Coordinates | 53°45′22″N 2°43′24″W / 53.7560°N 2.7234°W |
| Type | Castle |
| Site history | |
| Built | Mediaeval |
| In use | Until 1232 |
| Official name | Castle Hill motte |
| Designated | 26 November 1969 |
| Reference no. | 1011868 |
Penwortham Castle was built on the south bank of the River Ribble, at Penwortham to the west of Preston, Lancashire, England, at grid reference SD524291. The site is a Scheduled Ancient Monument.
It was built shortly after the Norman conquest as a motte castle by Roger of Poitou. It served to guard the estuary of the river and a ford crossing it. When Roger built Lancaster Castle, Penwortham declined in importance. Now only the mound remains.