#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#define abs(x) ((x>0)?(x):(-x))
#define max(a,b) (((a)>(b))?(a):(b))
#define min(a,b) (((a)<(b))?(a):(b))
#define NAME "triangle.in" /* !!!!!!!!!!!!!!!! */


int n,i,s,ca=0;
int tab[300][300];
char c;
int ar,d,bi,t,j,dis,k,h,bien;
int mal[2],dis1,dis2;

int main(void){
	freopen(NAME,"rt",stdin);
        while(1){
          ca++;
          scanf("%d",&n);
          if(!n) break;
          for(i=n;i>0;i--){
            for(j=n-i;j<n-1+i;j++){
              scanf(" %c",&c);
              if(c=='#') tab[n-i][j]=0;
              else tab[n-i][j]=1;
              /*printf("%d ",tab[n-i][j]);*/
            }
          }
          ar=0;
          for(i=0;i<n;i++){
            for(j=i;j<2*n-1-i;j++){
              if(tab[i][j]==0) continue;
              ar=max(ar,1);
              if((i+j)%2){
                s=1;
              }
              else{
                s=-1;
              }
              dis1=n-1-i;
              dis2=i;
              dis1=min(dis1,j-i);
              dis1=min(dis1,2*n-2-i-j);
              dis2=min(dis2,j-i);
              dis2=min(dis2,2*n-2-i-j);
              dis=max(dis1,dis2);
              mal[0]=0;
              mal[1]=0;
              for(k=1;k<=dis;k++){
                if(mal[k%2]) break;
                if(s==1)
                  if(k>dis1) continue;
                if(s==-1)
                  if(k>dis2) continue;  
                bien=1;
                for(h=0;h<2*k;h++){
                  if(tab[i+s*(h/2)][j-k+(h+1)/2]==0){
                    bien=0;
                  }
                  if(tab[i+s*(h/2)][j+k-(h+1)/2]==0){
                    bien=0;
                  }
                }
                if(tab[i+s*k][j]==0){
                  bien=0;
                }
                t=k+1;
                t=t*t;
                if(bien) ar=max(ar,t);
                else{
                  mal[(k%2)]=1;
                  if((mal[0])&&(mal[1])) break;  
                }
                s=-s;
              }
            }
          }
          printf("Triangle #%d\n",ca);     
          printf("The largest triangle area is %d.\n\n",ar);
        }         

	return 0;
}