When closing two Chrome windows, the last one closed is the main one when opening next time. How to restore tabs from the first one?

Question

Google Chrome

2 Chrome windows were open, the main one with a bunch of old tabs and one with one random tab. First I closed the main window, then with one tab. When you open the next time, the last closed one became the main one, you can’t restore tabs from the main window, maybe there is some way. I didn’t find them in history, I don’t remember how exactly the tabs were.

Answer 1

Ctrl + Shift + T
Try it

Answer 2

The second (and any subsequent) Chrome window is just one of the tabs of the first one. It is easy to verify this by taking this second window with the cursor "by the scruff" and dragging it among the tabs of the first one - it will appear there. By the way, on the contrary, too, any bookmark can be pulled out into a separate window.
Therefore, all bookmarks of all windows must be in history.

I didn’t find them in history, I don’t remember how exactly the tabs were.

"Not found" is another matter. Then fix more precisely the entire period of time for which they have accumulated, and open all the lines of history for this period. The ones you are looking for must be among those open ones. And then - as prompted by visual memory.
And for the future: storing useful bookmarks in clear text consumes a lot of RAM. And besides, this method of storage is unreliable (you yourself saw this). It is more correct to create a shortcut in the bookmarks bar for each useful Internet resource found.