History of the First Crusade – Interactive Map and Timeline

Unofficial advice:

I think your posts are interesting, but you are posting too much. There are no official guidelines about what is too much, but posting 7 links to your site in 2 days is too much for me.

I recommend to post at most one per day. I actually prefer one per week, but since this is a made up rule by me, let's be conservative.

People liked your post in https://news.ycombinator.com/item?id=32330956 but too many similar post cause fatigue and people will just ignore them. You will get better results with more time between posts.

Also too many post will cause users to get angry and flag your post or trigger automatic spam filters or even manual actions by the mods.

You should send an email to the mods hn@ycombinator.com to get official advice about posting. They are friendly and usually reply the same day a few hours later.