A bar/tabac called "Francis" located at the bottom of the stairs of Montmartre and the Sacré-Cœur could create a charming and lively scene. The bar might have a small, intimate atmosphere, with tables and chairs spilling out onto the street.

The exterior of the bar could be adorned with colorful signage and decorations, with the name "Francis" prominently displayed. The street in front of the bar could be bustling with activity, with tourists and locals alike stopping in for a drink or a quick snack.

The stairs of Montmartre and the Sacré-Cœur could be visible in the foreground of the photo, adding a sense of history and grandeur to the scene. The steep stairs could create a sense of movement and energy, contrasting with the static charm of the bar.

Inside the bar, patrons might be gathered around the bar, sipping wine or beer and chatting with each other. The walls might be adorned with paintings or photographs, giving the space a sense of character and personality. The sound of conversation and laughter could fill the air, adding to the lively atmosphere of the bar.

Overall, a photo of "Francis" at the bottom of the stairs of Montmartre and the Sacré-Cœur could capture the charm and character of one of Paris's most vibrant neighborhoods, while also showcasing the city's unique bar culture.