Simplify the following text for a Grade 8 native English-speaking person.
Original: LÃ 1\/4 neburg 's salt was in great demand and the town quickly became one of the wealthiest and most important towns in the Hanseatic League , together with Bergen and Visby ( the fish suppliers ) and LÃ 1\/4 beck ( the central trading post between the Baltic and the interior ) . In the Middle Ages salt was initially conveyed overland up the Old Salt Road to LÃ 1\/4 beck .
Simplified: The countryside changed into heathland which is called the LÃ 1\/4 neburger Heide ( LÃ 1\/4 neburg Heath ) .