It connects the PERSON@1 with the PERSON@2 , a palace that was built as a resort to prince-electors in the first half of the 18th century , and whose grounds are now a botanical garden -LRB- the Botanischer Garten LOCATION@1 -RRB- .

The Poppelsdorfer Allee , an alley flanked by chestnut trees , connects the PERSON@1 with the PERSON@2 , a palace that was built as a resort to prince-electors in the first half of the 18th century .
