The Victorian theme is describing city life and people in the city. What is more important and more victorian about this is that it speaks of Paris and the french revolution, in a disparaging tone, which was pretty common in the Victorian era, as high ranked people in the society despised the french revolution as they feared it would transfer to Britain and in turn ruin their aristocracy.
Iambic Pentameter. It's written in Iambs (sets of one strong followed by one weak syllable), and there are five of these per line (hence pentameter). It's most commonly associated with Shakespeare.
