I happen to think that most old buildings look better with a few climbing roses, et al, wending their verdant ways between windows, and around doorways.
The juxtaposition of hard stone/brick and soft foliage has an appeal unto itself.
With this in mind, I have always wondered why England's ancient village churches are not swathed in Roses, Wisteria, or Clematis; surely they could only enhance the beauty of such buildings.
Maybe the killjoy church hierarchy have issued an edict about such things. Perhaps they have declared that the only focus of adornment should be the fragrant vicar, and his highly embroidered 'frocks'!