ὀλίγοι τινὲς ὧν ἐντετύχηκα → a very few whom I've met
art of building: P. ἡ οἰκοδομική.
structure: P. κατασκευή, ἡ.
act of budding: P. οἰκοδομία, ἡ, οἰκοδόμησις, ἡ.