The oldest boats found by archaeological excavation are logboats, with the oldest logboat found, the Pesse canoe found in a bog in the Netherlands, being carbon dated to 8040 - 7510 BC, making it 9,500–10,000 years old,[4][5][6][7] a 7,000-year-old seagoing boat made from reeds and tar has been found in Kuwait.[8] Boats were used between 4000 -3000 BC in Sumer,[9] ancient Egypt[10] and in the Indian Ocean.[9] There is evidence of camel pulled wheeled vehicles about 4000–3000 BC.[11] The earliest evidence of a wagonway, a predecessor of the railway, found so far was the 6 to 8.5 km (4 to 5 mi) long Diolkos wagonway, which transported boats across the Isthmus of Corinth in Greece since around 600 BC.[12][13] Wheeled vehicles pulled by men and animals ran in grooves in limestone, which provided the track element, preventing the wagons from leaving the intended route.[13] In 200 CE, Ma Jun built a south-pointing chariot, a vehicle with an early form of guidance system.[14] Railways began reappearing in Europe after the Dark Ages. The earliest known record of a railway in Europe from this period is a stained-glass window in the Minster of Freiburg im Breisgau dating from around 1350.[15] In 1515, Cardinal Matthäus Lang wrote a description of the Reisszug, a funicular railway at the Hohensalzburg Fortress in Austria.