GRATACELS By Alhassan Mohammed Period: 1927 to 1932 Gratecel de l´Hospitalet Period: 1968 to 1970 Trump International Hotel And Tower Period: 1999 to 2001 Trump World Tower Period: 2003 to 2007 New York Times Building Period: 2004 to 2010 Burj Khalifa Period: 2006 to 2010 Hotel Porta Fira Period: 2007 to 2012 Intempo Period: 2008 to 2015 Torre de Shanghali Period: 2017 to 2020 Caleido