Bob K. posted the following:

>Paradis [Paradisi], Maria Teresa von (1759-1824)
>[Dave's guess] wrote 2 piano concertos, both are apparently "lost", so who
>knows the dates...

Yes, her concertos in c major and g minor are supposedly lost.

>Martinez, Marienne (1774-1812)
>wrote 2 piano concertos but no dates are given; either would predate the
>Clara Schumann necessarily.

Bob has her dates wrong.  They should be 1744-1812.  Her concertos probably
date from 1772.

>Kauth, Maria Magdalena (late 18th cent)
>Concerto for Piano & Orchestra (1792)
>Never heard of her.  But this is the earliest one with a date I could
>find...almost.  Well, the earliest "proper" piano concerto as we would call
>it today.

There may be another one, too.

Allan Ho