The Burj Khalifa contains elevators.
Bolesław of Dobrzyn -LRB- pl  : Boleslaw dobrzynski ; betw .. Dobrzyn. Dobrzyn nad Wisła. 1303 / 06 - 1 October 1327 / 12 March 1329 , most probably in 1328 -RRB- , was a Polish prince , member of the House of Piast .. House of Piast. House of Piast. Polish. Poles. He was Duke of Dobrzyn during 1312-1327 -LRB- until 1316 under the regency of his mother and since them under the tutelage of his oldest brother -RRB- and Duke of Łeczyca since 1327 jointly with his brother .. Dobrzyn. Dobrzyn nad Wisła. Łeczyca. Łeczyca. He was the fourth or second son of Siemowit of Dobrzyn and Anastasia , daughter of Leo I of Halych-Peremyshl .. Dobrzyn. Dobrzyn nad Wisła. Siemowit of Dobrzyn. Siemowit of Dobrzyn. Leo I of Halych-Peremyshl. Leo I of Galicia. It 's unknown after whom he was named ; probably was in honour to Bolesław II of Płock , his father 's cousin .. Bolesław II of Płock. Bolesław II of Masovia