Ngnix Rewrite rules - include path on url

I have an application with 2 domains.

One of them www.dominiolisboa.com I need to redirect the requests of the / to /lisboa/pt-PT

When someone type www.dominiolisboa.com needs to be redirected to www.dominiolisboa.com/lisboa/pt-PT

I've tried the following rule

server {
        listen 80;
  server_name  rockinriolisboa.sapo.pt www.rockinriolisboa.sapo.pt;
        location / {
           rewrite ^ /lisboa/pt-BR/$request_uri permanent;
        }
}

But this way I get the error ERR_TOO_MANY_REDIRECTS