Inspired by my previous bunch of threads about similar PODs (themselves inspired by a bunch of FAI stuff).
Apparently, IOTL, the then-future Paul I got very ill in 1771, and even though he recovered he had significant health problems ever since.
POD: he doesn't recover, and dies. Bam, no heir.
The problem is, in this context, no heir means no heir. Almost literally. As far as I can tell, while there is a bunch of theoretically possible heirs, all of them are either imprisoned (relatively secretly at that), so distantly related that only genealogists would know, only related from the German side (i.e. blood relatives of Catherine), morganatic/bastard children, or just random claimants (like Pugachev).
Note that IOTL Catherine II didn't die until 1796 (and is only 42 years old in 1771), so theoretically there's plenty of time for her to marry someone, get a child and declare them heir (if she would want so). But of course even Catherine II herself is a bit illegitimate as a "Romanov" ruler; the resulting "heir" would only have the vaguest connection to the Romanov dynasty, and even in the absence of other possibilities that might not be popular (I suspect many might well prefer choosing a new dynasty, 1613 style, over crowning someone so unconnected to the old one).
Recap: then-future Paul I of Russia dies in 1771, now there's no heir and no obvious way to get one.
What happens?
Apparently, IOTL, the then-future Paul I got very ill in 1771, and even though he recovered he had significant health problems ever since.
POD: he doesn't recover, and dies. Bam, no heir.
The problem is, in this context, no heir means no heir. Almost literally. As far as I can tell, while there is a bunch of theoretically possible heirs, all of them are either imprisoned (relatively secretly at that), so distantly related that only genealogists would know, only related from the German side (i.e. blood relatives of Catherine), morganatic/bastard children, or just random claimants (like Pugachev).
Note that IOTL Catherine II didn't die until 1796 (and is only 42 years old in 1771), so theoretically there's plenty of time for her to marry someone, get a child and declare them heir (if she would want so). But of course even Catherine II herself is a bit illegitimate as a "Romanov" ruler; the resulting "heir" would only have the vaguest connection to the Romanov dynasty, and even in the absence of other possibilities that might not be popular (I suspect many might well prefer choosing a new dynasty, 1613 style, over crowning someone so unconnected to the old one).
Recap: then-future Paul I of Russia dies in 1771, now there's no heir and no obvious way to get one.
What happens?