Dampyr #104 (2008) pages 60-61: Sinister paintings (NSFW)

Tesla follows Hanneke into a building whose interior is decorated with original art:

“Hanneke! Wait! Crap! A Sinistrari exhibition? I suspect it’s no coincidence, but Henneke just entered here, and I can’t leave her alone. Sinistrari’s paintings! Truly uplifting, so cheerful and sunny. But where is Hanneke?”

This series often works historical figures like Giacomo Casanova into the narrative, but as far as I know, the painter Gerolamo Sinistrari is fictional. Take time to digest the paintings, which include a Witches' Sabbath and a Sinistari self-portait. Some of them will become germane to the story. None are "uplifting, cheerful and sunny."