Mentioned by Edinburgh 2 days itinerary
2 Days In Edinburgh: The Perfect Edinburgh Itinerary
"Right over the road from Holyrood Palace is the Scottish Parliament building, a relatively new addition to the city, from where the governing of Scotland takes place. It’s possible to visit the Scottish Parliament, either as part of a guided tour, or you can pop in yourself and see government at work. It’s free to visit, both on a guided tour or self-guided, although you need a ticket (free) if you want to watch a debate in the chamber."