Simplify the following text for a Grade 9 native English-speaking person.
Original: Even after Iceland 's union with Norway , the Althing still held its sessions at Ã ingvellir until 1799 , when it was discontinued for 45 years .
Simplified: Even after Iceland 's union with Norway , the Althing still held its meetings at Ã ingvellir until 1799 , when it was stopped for several years .