Longest ancient canal
Who
Grand Canal of China
Where
China ()
When
1326
The longest canal in the ancient world was the Grand Canal of China from Beijing to Hangzhou. It was begun in 540BC and not completed until 1327, by which time it extended (including canalized river sections) for 1781km 1107miles. Having been allowed by 1950 to silt up to the point that it was nowhere more than 1.8m 6ft deep, it is now, however, plied by vessels of up to 2000tonnes.