Around the 1st century BC North Africa was the main source of wheat for the Roman empire. Wheat was extensively imported over sea to harbours like Ostia. The trade routes were the lifelines of the Roman Empire. Wheat for the legions that were stationed at the Limes in Germania was mainly imported from Great Britain. Plinius the Elder and Columella both write about wheat. The Romans called wheat 'ver'. The meal that was made of ver was called 'Farina'. This dried wheat is delivered in bundles of 70 cm. It is suitable for making garlands.