In Gothic architecture, there would always be a pointed arch and a ribbed vault, as well as a flying buttress. The entire place would have numerous carvings of great artistic value that would only point out even more how great of a building it would be, since it was one of the primary goals of Gothic builders, making things huge and imposing.
I would've enjoyed because becoming a master builder for such a project means that the government of the country trusts you to be skillful enough to create such a massive building with huge historic importance and this would only mean that they have you in high esteem and respect you. It would be something like the cherry on top of an amazing architectural career.
The cost of a human life
The evil nature of men towards each other
The search for children who had been sold
The quick passage of time in the life of a child