0 1 6 ▁in ▁We imar ▁and ▁Berlin , ▁Germany ▁ ▁Sum m its ▁of ▁heads ▁of ▁state ▁▁ 2 1 ▁September ▁ 1 9 9 3 ▁in ▁G da ń sk , ▁Poland ▁▁ 2 1 ▁February ▁ 1 9 9 8 ▁in ▁Poz na ń , ▁Poland ▁▁ 7 ▁May ▁ 1 9 9 9 ▁in ▁Nancy , ▁France ▁▁ 2 7 ▁February ▁ 2 0 0 1 ▁in ▁Hamb ach , ▁Germany . ▁▁ 9 ▁May ▁ 2 0 0 3 ▁in ▁W roc ław , ▁Poland . ▁H eld ▁a ▁few ▁days ▁before ▁the ▁refer endum ▁on ▁the ▁entry ▁of ▁Poland ▁in ▁the ▁European ▁Union . ▁▁ 1 9 ▁May ▁ 2 0 0 5 ▁in ▁Nancy , ▁France ▁▁ 5 ▁December ▁ 2 0 0 6 ▁in ▁M ett lach , ▁Germany ▁▁ 7 ▁February ▁ 2 0 1 1 ▁in ▁Wars aw , ▁Poland ▁ ▁Sum mit ▁on ▁ 3 ▁July ▁ 2 0 0 6 ▁in ▁We imar , ▁Germany ▁was ▁post pon ed ▁due ▁to ▁alleg ed ▁ind is position ▁of ▁the ▁Polish ▁president ▁Le ch ▁K ac zy ński . ▁ ▁Sum m its ▁of ▁Def ence ▁Minister s ▁▁ 2 5 ▁July ▁ 2 0 0 6 ▁in ▁Wiel icz ka , ▁Poland ▁▁ 1 8 ▁December ▁ 2 0 0 7 ▁in ▁Berlin , ▁Germany ▁ ▁In ▁March ▁ 2 0 1 5 , ▁Germany ' s ▁Minister ▁of ▁Def ence ▁Urs ula ▁von ▁der ▁Le yen ▁hosted ▁her ▁counter parts ▁Jean