In Florence, the same street can have two separate number sequences. A traditional black civic number identifies one entrance, while a red number belongs to a different sequence historically used for non-residential entrances such as shops, workshops and garages. That means 20 and 20R may be nowhere near each other. If your hotel, restaurant or shop address includes an R, /R or the word rosso, do not ignore it.
The key to Florence red and black street numbers is to treat the color as part of the address itself. “Via Something 18” and “Via Something 18R” are two different addresses, not two versions of the same doorway.
What a red number means in Florence
Florence traditionally maintained two independent sets of street numbers. Black numbers, called numeri civici neri, were associated mainly with residential entrances. Red numbers, numeri civici rossi, were introduced for non-residential access, especially shops and other commercial premises.
The important word is independent. The black sequence might run 10, 12, 14 while red numbers 10R, 12R and 14R appear much farther along the street. You cannot find 12R by locating black number 12 and checking the next doorway.
The Comune di Firenze has acknowledged that on long streets the matching red and black number can be separated by several hundred metres. Its municipal address database therefore records the color as an actual attribute of each civic number. Travelers who need to verify a troublesome address can use the city’s Toponomastica e Numerazione Civica information.
How red addresses are written
You will encounter several formats that mean essentially the same thing:
- 24R
- 24r
- 24/R
- 24 rosso
- 24 red on an English-language booking confirmation
Florence’s official tourism information sometimes spells the distinction out as rosso, while businesses commonly shorten it to r or /r.
A plain address such as “Via Example 24” normally refers to the ordinary black civic number. Italians generally do not append a letter meaning “black.” If clarification is necessary, someone may say 24 nero.
Why you can find a shop with a black number
The old rule of “red equals shop, black equals home” is useful for understanding Florence, but it is no longer a reliable way to predict an address.
Under the city’s current civic-numbering regulations, street openings are assigned black numbers. Existing red numbers remain valid fino a esaurimento, meaning until they are progressively replaced or disappear through changes to the property. The municipality has been phasing the red system out rather than renumbering the whole city at once.
So today you can encounter an ordinary shop with a black civic number. You can also still find thousands of long-established businesses using red ones. Follow the address that the business or accommodation actually gives you rather than trying to infer its color from what is behind the door.
Why your map can send you to the wrong place
Red numbers have historically caused trouble for digital maps because an address database has to understand that “35” and “35R” belong to different numbering systems. Florence has specifically encouraged mapping companies to use its georeferenced municipal dataset, which includes whether an address is red or black.
Mapping has improved, but an incorrect pin is still possible, especially after a business moves, an address changes, or a booking platform strips the “R” from a listing.
If a numeric search looks suspicious, search for the name of the hotel, restaurant or shop instead. The business pin, recent confirmation message and official website often give you a better cross-check than typing the street number alone.
How to find the correct doorway on the street
- Read the complete address before you start walking. Check for R, /R, rosso, an apartment number or additional instructions from your host.
- Confirm the street name. Florence has many short streets, borghi, vie, piazze and similarly named places. A correct number on the wrong street will not help.
- Look at the numbers on actual doorways. Do not assume the map pin is the final few metres of navigation.
- If you need a red address, follow the red sequence. Ignore nearby black numbers when trying to estimate how far you have left.
- Use the business name as a second reference. Shopfront signs are particularly useful when the red plaque is small, faded or partially obscured.
Florence’s street numbering also follows an underlying geographic logic. Under the municipal rules, streets roughly parallel to the Arno are oriented from upstream toward downstream. Streets crossing the river’s direction generally increase away from the Arno, northward on the right bank and southward on the left bank. On ordinary streets, odd and even numbers occupy opposite sides according to that increasing direction.
That system can tell you whether numbers should be rising or falling as you walk, but it does not reconnect the red and black sequences. If you are looking for 70R, a nearby black 68 does not mean you are almost there.
Civico, interno, scala and piano are different things
Apartment instructions often contain several numbers, and mixing them up can leave you pressing the wrong doorbell.
- Civico or numero civico: the exterior street number.
- Rosso: tells you that the civic number belongs to the red sequence.
- Interno: the apartment or unit inside the building.
- Scala: the staircase or stairwell, common in larger buildings.
- Piano: the floor.
For example, instructions that say “civico 18, interno 7, secondo piano” mean street entrance 18, apartment 7, second floor. The 7 is not another street number.
What to check before arriving at a Florence apartment
Short-term rentals deserve extra attention because the name shown on a booking site may not appear anywhere on the building. Check the host’s arrival message rather than relying solely on the platform’s map pin.
You want four pieces of information: the complete street name, the exterior civic number, whether that number is red, and the doorbell or campanello name. If the accommodation has self check-in, also save the entry code somewhere accessible offline.
A rental apartment will commonly use a residential entrance, but do not assume that means the address cannot contain a red number. Some properties have reception desks or access arrangements through premises with different numbering. The host’s written directions take priority.
What to do if you are standing at the wrong number
First, check whether you accidentally dropped the R. This is the classic Florence address mistake.
If your destination is 42R but you are standing outside black 42, do not simply inspect the adjoining doors. Search again using “42R,” “42/R” or the destination’s name. On a long street, the correct entrance may be a considerable walk away.
If that still fails, ask:
Scusi, cerco il numero quarantadue rosso. È da questa parte?
“Excuse me, I’m looking for number 42 red. Is it this way?”
Or, when you need to clarify the address:
È il quarantadue rosso o nero?
“Is it number 42 red or black?”
Florentines are familiar with the distinction. Saying rosso is much clearer than trying to explain that your map has put the pin in the wrong place.
If you have luggage, verify before backtracking
The red-number problem becomes considerably less charming when you are pulling two suitcases across central Florence.
If the doorway does not match your accommodation description, stop before walking several blocks in either direction. Check the original booking confirmation, search the property name and message or call the host. A missing “R” can create a much larger error than simply being on the wrong side of the street.
For a taxi arrival, give the driver the full address and say rosso aloud if applicable. Giving the accommodation or business name as well is useful. If you are deciding whether a cab can get close to a central property, see our practical explanation of using taxis in Florence.
Do not confuse red street numbers with Florence’s ZTL signs
The color system has nothing to do with the city’s restricted traffic zone. A red civic number does not mean a street is closed to cars, and a black number does not mean you can legally drive there.
Central Florence has a camera-controlled Zona a Traffico Limitato, or ZTL, with separate access rules. If you are arriving in a rental car, confirm your legal route and parking arrangements independently rather than following a map blindly to the front door. Our Florence parking guide covers that problem in more detail.
A simple rule for saving Florence addresses
Whenever you save a Florence restaurant, shop, hotel or apartment, copy the complete address exactly as supplied. Do not remove a lowercase “r” because it looks like a formatting error. It can be the most important character in the address.
The same habit is useful when you build your Italy itinerary: save the destination name alongside the full civic number, not just a map pin. That gives you something to cross-check if the pin and the doorway disagree.
The Comune’s current toponymy and civic-numbering regulations make the modern position clear: new street openings use black numbering, while the historic red numbers remain valid as they are gradually phased out. Until that process is finished, “R” in a Florence address should be read as part of the number, not as optional punctuation.