Lisnaran Fort
{{Use dmy dates|date=November 2021}}
{{Use Irish English|date=November 2021}}
{{Infobox ancient site
| name =Lisnaran Fort
| native_name =Lios na Rann
| native_name_lang =ga
| alternate_name =
| image =
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| map =
| map_type = Ireland
| map_alt =
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| map_size =
| altitude_m = 17
| relief =
| coordinates = {{coord|53.882652|-6.347109|display=inline,title}}
| map_dot_label =
| location = Linns, Annagassan, County Louth, Ireland
| region =Dundalk Harbour
| type = ringfort
| part_of = Linn Duachaill?
| length =
| width =
| volume =
| circumference= {{Convert|335|m|abbr=on}}
| area= {{Convert|0.2|ha|abbr=on}}
| height =
| builder = Norse Gaels?
| material = earth
| built = 9th–10th century
| abandoned = 14th century?
| epochs = Viking Ireland
| cultures = Norse Gaels/Gaelic Irish
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| archaeologists = Paul Stevens
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| public_access = yes
| designation1 =National Monument of Ireland
| designation1_offname =Lisnaran Fort
| designation1_number =579
| website =
| notes =
}}
Lisnaran Fort is a ringfort (rath) and National Monument located in County Louth, Ireland.{{cite journal|jstor=27728287|title=A Hoard of Coins Found near Annagassan|first=A. M.|last=Mahr|date=1 January 1929|journal=Journal of the County Louth Archaeological Society|volume=7|issue=1|pages=42–45|doi=10.2307/27728287}}{{cite book|url=https://books.google.com/books?id=gZQMAQAAMAAJ&q=lisnaran|title=Medieval Dublin ...|first=Friends of Medieval Dublin|last=Symposium|date=1 January 2008|publisher=Four Courts Press|isbn=9781846820427|via=Google Books}}
Location
Lisnaran Fort is located outside Annagassan, near the meeting-point of the River Glyde and River Dee.{{cite book|url=https://books.google.com/books?id=w5pnAAAAMAAJ&q=lisnaran%20fort|title=Laois: History & Society|first=William|last=Nolan|date=1 January 1999|publisher=Geography Publications|isbn=9780906602461|via=Google Books}}
History
{{Coin image box 2 singles
| header = Edward II pennies
| image_left = Image:Silver penny of Edward II (YORYM 2014 452 665) obverse.jpg
| image_right= Image:Silver penny of Edward II (YORYM 2014 452 665) reverse.jpg
| caption_left = Obverse
| caption_right = Reverse
| width_left = 90
| width_right = 90
| footer = Pennies of Edward II, like those found at Lisnaran.
| position = left
| margin = 0
}}
Lisnaran contains the remains of circular and a rectangular structures, and may have featured more extensive defences outside the main enclosure.{{cite web|url=http://www.excavations.ie/report/2010/Louth/0021676/|title=21676 « Excavations|publisher=}} It was historically associated with the Viking longphort Linn Duachaill, but the combination of a hillfort with round and rectangular structures suggests a Gaelic Irish origin. The only find at Lisnaran was a wooden box in 1928, containing twelve silver pennies, all dating from 1279–1315 and from the reign of Edward I or Edward II as Lord of Ireland.{{cite web|url=http://www.historyireland.com/pre-norman-history/the-longphort-phenomenon-in-early-christian-and-viking-ireland/|title=The longphort phenomenon in Early Christian and Viking Ireland|date=22 February 2013|publisher=}}{{cite journal|jstor=27728287|title=A Hoard of Coins Found near Annagassan|first=A. M.|last=Mahr|date=1 January 1929|journal=Journal of the County Louth Archaeological Society|volume=7|issue=1|pages=42–45|doi=10.2307/27728287}}