pocarovna:

Hello anon!
I can only guess what you mean – the name is kútna plachta (”corner cloth”), and it was used in many Slavic countries. I will use Slovak and Czech examples here. 
It is really an embroidered sheet of cloth: 

What was it for? As the name says, this piece of cloth was hung in the corner of the room (position varies throughout regions), in order to create a private, personal space for mother and baby after birth: 

It is basically a great disproof of the wide-spread idea “In the past, the mother gave birth right in the field and resumed working”.
 
NO. That´s not true. Corner cloth is the proof. 

Corner cloth was used in the lying-in time, that is six weeks after birth. During that time, the mother could devote all her time exclusively to herself and the baby, as within the corner cloth area, she was not to be disturbed. 
During that time, relatives would come to provide warm food and do the housework. Again, it was no visits to see the baby. The woman was not disturbed. 
In a way, this was much better than the present situation in some aspects – the woman did not have to expect visitors, take care of the husband and other children. nothing. 

The cloth was usually embroidered or decorated heavily: 

The reason is, this cloth was considered a ritual piece. 

In some areas of Slovakia, the cloth was embroidered during maidenhood, and the bride was wearing it around her arms during the wedding ceremony. 

If you have any other examples from different countries, please let me know! 

I´d love to find out if there is a similar tradition present outside the slavic world. 🙂