Excellent!
Aviation Museum in Kraków has lots of "sole survivors". Besides many historical Polish planes, it's also host of part of the former Hermann Goering's collection (
Deutsche Luftfahrt Sammlung), that in late 1943 was partially evacuated to the territories that are now Western Poland. Of the original 120 planes of the DLS, half were destroyed before the evacuation (during British bombing raids), and about quarter was dispersed. 27 ended up in Poland, 4 of which were later traded with other museums. Sadly, post-war years weren't good times for ex-German aircraft, so for long time many of these planes were badly neglected. Still, due to hard work, many of them were more-or-less reconstructed. Both Curtiss Hawk Export and - paradoxically PZL P.11c (as well as PWS-26) are former examples from DLS. Other former DLS-aircraft in Kraków museum are (although quite a lot of them unfortunately without wings): Levasseur Antoinette (1908), Geest Moewe IV (1913), Wagner Eule (1914), Albatros C.I (1915), Aviatik C.III (1917), LVG B.IIa (1917), Halberstadt CL.II (1917), LFG-Roland D.VIb (1918), Siemens-Schuckert D.IV (1918), DFW C.V (1917), Sopwith Camel (1917), Grigorovich M.15 (1916), Albatros B.IIa (1919?), Zeppelin-Staaken R.VI (1917), Etrich Taube (1932 replica), PZL P.11c, PWS-26, Stinson L-5, Curtiss Hawk, Heinkel He-5c, Albatros L.101, DFS Storch and Me-209 (between 1939 and 1969 world's fastest prop-driven aircrarft - sadly it's in bad condition). Of the 14 oldest aircraft mentioned only Antoinette and Camel can be found in other museums, while rest are only ones in the world (although Antoinette is only surviving German-built, while Camel is only surviving with Bentley BR.1 engine). Among those traded with other museums, there were DH.9 (traded with Great Britain for Spitfire) and Fokker Spin (one of two surviving) that was transferred to the Netherlands.