Oak planking was common on high status Viking longships in the 9th and 10th centuries.
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10 Facts About Oak
2.
Oak bark is rich in tannin, and is used by tanners for tanning leather.
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3.
Oak galls were used for centuries as a main ingredient in iron gall ink for manuscripts, harvested at a specific time of year.
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4.
Oak is a common symbol of strength and endurance and has been chosen as the national tree of many countries.
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5.
Oak is the emblem of County Londonderry in Northern Ireland, as a vast amount of the county was covered in forests of the tree until relatively recently.
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6.
Oak is a national symbol from the Basque Country, especially in the province of Biscay.
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7.
Oak leaves are traditionally an important part of German Army regalia.
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8.
Oak leaves are embroidered onto the covers worn by field grade officers and flag officers in the United States armed services.
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10.
Thor's Oak was a sacred tree of the Germanic Chatti tribe.
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