Question: Who is the paternal grandfather of Vladimir Vasilkovich?
Sentence (from "Vladimir Vasilkovich"): In the 1270s (1276, according to most sources) he founded a castle that included a keep now famous as the Tower of Kamyanets, and around which sprang up the town of Kamyanets, now in Belarus; he also authored the construction of a similar tower in the re-built castle of Berestye (modern Brest, Belarus).
Relevant evidence: No