Heroes of Might & Magic III: Horn of the Abyss

to Docent: on the first page, 2nd screenshot - there's some kind of art in the slot under the ballista - what is it and what's it for?))

It's an old variant of one of the potions. The potion system has been revised since then, the graphics have been changed, and we decided not to place it in the slot with the ballista and postponed it to version 2.0. :)

Can you tell me the website address for the city of Cove?

The modern Cove doesn't have a website. There used to be a website that hasn't been updated for a long time, and then, if I remember correctly, we closed it. Although, we created a copy of it on some free hosting - I don't remember the address anymore, and there's nothing to see on it.
Absolutely everything that was on that site has been redone now... except for a couple of old hero portraits and some general information.