Hence, he does not seem to have any problem with decorative elements in architecture. A consideration of the quoted passage may also be connected with the discussion of ornamentation in section 14, made famous by Derrida. By contrast to section 16, Kant here describes ornamentation as adding to our tastes liking. It does this by way of its form. Nor is architecture excluded, since Kant explicitly mentions colonnades around magnificent buildings.
Ornamentation is here significantly differentiated from finery.
The latter commends the work to our approval by way of mere charm. Only finery, and not ornamentation, impairs genuine beauty. Perhaps Kant disapproves of tattoos because they permit a charm of sense to be linked with the human figure. In section 17 he refers t the human figure as the ideal of beauty. But remember that, for Kant, tattoos are in the same category as objects of pure beauty, and therefore are not mere matters of charms of sense, except insofar as they feature bright colors.