I have understood molemgenerally of the buildings of Rome, not specially of Maecenas' tower.
Miratur molem Aeneas, magalia quondam, Miratur portas strepitumque et strata viarum"-- is in favour of the former view.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "molem" in a variety of sentences. We hope that you will now be able to make sentences using this word.