| 11. | The exact date when the obelisk was built is currently unknown.
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| 12. | All three countries can be seen from each of the obelisks.
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| 13. | The Pennsylvania National Guard later provided an obelisk for his grave.
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| 14. | Since 1955 the obelisk has been a Grade II listed building.
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| 15. | The obelisk is not the only Nelson memorial extant at Swarland.
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| 16. | Estimates of the combined height of the obelisk and base vary.
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| 17. | The obelisk activates and deflects the asteroid with minutes to spare.
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| 18. | At the center of the fountain is a pink granite obelisk.
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| 19. | A pair of obelisks usually stood in front of a pylon.
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| 20. | On the lawn of the Old Capitol sit two marble obelisks.
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