sublime (adj.) Look up sublime at Dictionary.com
1580s, "expressing lofty ideas in an elevated manner," from Middle French sublime, from Latin sublimis "uplifted, high, lofty," possibly originally "sloping up to the lintel," from sub "up to" + limen "lintel."

The sublime (n.) "the sublime part of anything" is from 1670s. Sublime Porte, former title of the Ottoman government, is from French la Sublime Porte, literally "the high gate," a loan-translation of Arabic Bab 'Ali, title of the Ottoman court at Constantinople (cf. mikado).