Kriston Capps over at Grammar.police takes a look at two very different pieces of District architecture, the Italian Embassy on Massachusetts Avenue and the Mies van der Rohe-designed Martin Luther King Jr. library downtown. The Italian Embassy has always been a favorite of this DCist, sort of Florentine villa-meets-George Lucas fantasy type of deal, if such an architectural intersection is permitted. Then there’s the central library, which Capps doesn’t think is well suited to be…