Brazil postcards

Hello, friends.
A couple of years ago, I received a small number of postcards from various years and countries.
The postcards were all stacked in one box, without any organization.
The postcards were issued from the late 19th century to the mid-20th century.
While I was able to sort out the postcards from the Russian Empire and the USSR, postcards issued in other countries remain a mystery to me.
Today, I decided to share with you photographs of postcards issued in Brazil.
I would be very grateful if you could help me find the publication date or tell me how to determine the publication date on a Brazilian postcard.

Copacabana

Back side of postcard

Paris square in Rio de Janeiro

Back side of postcard

Rio de Janeiro Sugarloaf Mountain

Back side of postcard

Rodrigo de Freitas Lagoon Rio de Janeiro

Back side of postcard

Friends, thank you for your attention, see you soon.
Best regards @irve