Using either Koch or Placidus house systems, Taurus is the sign on the cusp of both my sixth and seventh houses and therefore Venus rules both of those houses.
It came about after reading Karen’s post on the sixth house on Ravenesque and connecting the dots for the ruler of my sixth house. I had one of those “aha” moments the other day about what we can learn from studying the ruler of the seventh house and the aspects to it in our natal charts.