Albania is not part of the EU or the eurozone, but at least some restaurants, shops, and museums accept payment in euros. (Neighboring countries Kosovo and Montenegro unilaterally adopted the euro as the de facto national currency in 2002… Europe is complicated!)
According to Wikipedia, the Albanian currency lek (plural leke) is named after Alexander the Great, and Albania operated on a gold standard until 1939.
The value of the lek is not pegged, but at the moment, 100 leke is worth about 1 US dollar or 1 euro, so the tourist shopping math is trivial, converting from one of those currencies.
More about my experience with Albanian bills and coins below.
Oh, and here are the other two souvenirs I brought back (apart from three books).