From the bookchallenge list:
500+ pages (892!)
classic romance (sort of a doomed romance. That's classic, right?)
set in a different country
from an author you love that you haven't read yet
based on a true story (well, with a number of historical personages)
at the bottom of your to-read list (Not in the sense of being the last one, but I looked about and decided which book I LEAST wanted to read. This is why I got through this long before my 2019 deadline)
a trilogy (Yes, it comprises three books: Book 6 – Solomon's Gold ; Book 7 – Currency ; Book 8 – The System of the World -- additionally, it is the third volume of the Baroque trilogy)
with magic (Alchemy counts (in this case))