{
  "id": "alumbrado-publico-de-la-ciudad-de-mexico",
  "type": "entity",
  "name": "Lighting Mexico City: the general street lighting of 1790 and how it was paid for",
  "summary": "In 1790 the ayuntamiento of Mexico City was ordered to find a permanent revenue for a general street lighting, and proposed three reales on each load of flour entering the capital — about 37,500 pesos a year against 35,429 pesos of lanterns already built. Its argument for the tax was arithmetic: spread over the 430 loaves a load of flour yields, the charge came to a quarter of an ounce of bread. By 1864 the city burned 1,914 lanterns of three competing designs.",
  "locale": "en",
  "tags": [
    "colonial-institutions",
    "new-spain",
    "mexico-city",
    "public-goods",
    "urban-history",
    "public-finance",
    "americas",
    "spanish-empire",
    "technology"
  ],
  "relations": [
    {
      "rel": "related",
      "target": "alhondiga-y-posito-de-la-ciudad-de-mexico"
    },
    {
      "rel": "related",
      "target": "propios-y-arbitrios-de-las-ciudades-de-indias"
    },
    {
      "rel": "related",
      "target": "cepeda-relacion-del-desague-1637"
    },
    {
      "rel": "related",
      "target": "acueducto-del-padre-tembleque"
    },
    {
      "rel": "related",
      "target": "real-hospicio-de-pobres-de-mexico"
    },
    {
      "rel": "related",
      "target": "real-ordenanza-de-intendentes-1786"
    }
  ],
  "questions": [
    "When did Mexico City get public street lighting?",
    "How was street lighting paid for in colonial Spanish America?",
    "What were serenos and what did they do?",
    "How many street lamps did Mexico City have in the nineteenth century?",
    "When did gas lighting reach Mexico City and what did it cost?",
    "Did colonial cities in the Americas provide public services?"
  ],
  "claims": [
    {
      "id": "c1",
      "text": "The order came first and the money afterwards, and the city's report dates both. Its section \"DE ALUMBRADO\" records that in 1790 the ayuntamiento was required to propose the arbitrios it judged conducive \"para la perpetua permanencia y conservacion del iluminado general\", and that it accordingly calculated what would be needed for \"conservacion de faroles, sueldos de gefes del alumbrado y de serenos y costo de las arrobas necesarias de aceite\" — lanterns, the wages of the lighting officers and of the night watchmen, and the oil. A public lighting service in this account is not only lamps but a staffed nightly round.",
      "sources": [
        "memoria-economica-municipalidad-de-mexico-1830"
      ],
      "confidence": 0.85
    },
    {
      "id": "c2",
      "text": "The proposal was made to a named viceroy on a named day and priced against a sunk cost. On 4 October 1790 the city put to \"el memorable conde de Revillagigedo\" that three reales be levied on each carga de harina entering the capital; at the usual hundred thousand loads a year this would yield 37,500 pesos, enough to pay off by instalments the 35,429 pesos 6 tomines 6 granos that the making of the lanterns and other equipment had already cost, and thereafter to sustain the service and replace its gear.",
      "sources": [
        "memoria-economica-municipalidad-de-mexico-1830"
      ],
      "confidence": 0.85
    },
    {
      "id": "c3",
      "text": "The argument used to carry the tax is worth quoting because it is an incidence argument. To incline the viceregal government, the city showed that the three reales, spread over the 430 loaves of bread that each load of milled flour must produce — the load costing about 9 pesos 1 real delivered to the baker — came to hardly a quarter of an ounce of bread on each loaf. The public good is defended by computing who pays for it and how little each payment is; the same computation concedes that the payer is whoever buys bread.",
      "sources": [
        "memoria-economica-municipalidad-de-mexico-1830"
      ],
      "confidence": 0.8
    },
    {
      "id": "c4",
      "text": "The lighting fund was not new money but money moved from famine relief. The same 1830 report records that the older grain levy of three cuartillas, whose product had belonged to the city's pósito or public granary, stopped being paid once the pósito was suppressed, was so ordered by the bando of 7 January 1813, and was restored by the conde del Venadito's bando of 14 May 1819 \"sin mas variacion que la de destinarse al alumbrado á que se habia de aplicar desde aquel dia\". Two grain charges, one raised for lamps in 1790 and one raised for maize in scarcity, ended in the same lighting budget.",
      "sources": [
        "memoria-economica-municipalidad-de-mexico-1830"
      ],
      "confidence": 0.85
    },
    {
      "id": "c5",
      "text": "Seventy years on, the service was large, itemised, and technologically mixed. The municipal prefect's printed report of 1864 counts 1,203 lanterns burning oil at 2¼ centavos a night, 377 lamps \"de la invencion de Bagally\" burning turpentine at 5¾ centavos, and 334 \"de la invencion de Green\" at 4½ centavos — 1,914 lanterns in all, costing 1,897 pesos 39¾ centavos a month and 22,768 pesos 77 centavos a year for the light alone, excluding wages and repairs. The city was running three lighting technologies side by side and publishing the unit cost of each.",
      "sources": [
        "azcarate-memoria-policia-urbana-mexico-1864"
      ],
      "confidence": 0.85
    },
    {
      "id": "c6",
      "text": "The 1864 report also records a contract that failed on price and was undone at the contractor's own request. A contract let in fulfilment of supreme orders fixed a price for the light above what it was costing the municipal fund under the direct administration of the regidor in charge; \"el contratista solicitó en seguida la rescision del contrato, que se llevó á efecto, volviendo á quedar el ramo bajo la administracion directa de la comision\". The prefect presents municipal operation as the cheaper arrangement and prints the figures that make the comparison checkable.",
      "sources": [
        "azcarate-memoria-policia-urbana-mexico-1864"
      ],
      "confidence": 0.8
    },
    {
      "id": "c7",
      "text": "The arrival of gas is priced in the same report, and it is not presented as a saving. Article 5 of the supreme decree of 5 January 1864 granted D. Juan Potts the exclusive privilege of lighting the city with gas, the municipality to pay 17 centavos for each lamp lit through the night on a basis of three cubic feet an hour, less a monthly rebate of 2½ per cent. On those terms the prefect calculates that lighting the existing 1,914 lanterns by gas would cost 115,794 pesos 60¾ centavos a year, against 22,768 for oil and turpentine — a difference of 93,025 pesos 83¾, \"poco más del cuádruplo de lo que hoy cuesta\", forcing the municipal budget up in proportion.",
      "sources": [
        "azcarate-memoria-policia-urbana-mexico-1864"
      ],
      "confidence": 0.85
    },
    {
      "id": "c8",
      "text": "Both reports are advocacy of a kind and should be read as such. The 1830 commission was arguing for the reform of the city's revenue branches and is the source of its own history of the lighting levy; the 1864 prefect was presenting his administration to the Regency of the Empire and is the source of the claim that his commission ran the service more cheaply than the contractor could. Neither is audited in the pages read here. What they jointly establish is the date of the general lighting, the tax chosen to pay for it, the argument used to justify it, the scale and unit costs of the service in 1864 and the terms of the gas concession. They do not establish how many lamps burned in 1790, how reliably they were lit, or what the serenos actually did on their rounds.",
      "sources": [
        "memoria-economica-municipalidad-de-mexico-1830",
        "azcarate-memoria-policia-urbana-mexico-1864"
      ],
      "confidence": 0.9
    }
  ],
  "takeaways": [],
  "faqs": [],
  "evidence_tier": "primary",
  "evidence": {
    "level": "industry_observation",
    "source_types": [
      "paper"
    ]
  },
  "moat_flag": false,
  "winning_edge": "Street lighting in late colonial Mexico City is usually a clause in a sentence about the second conde de Revillagigedo's tidy-mindedness, with no number attached. Here the financing is quoted from the ayuntamiento's own printed report — the date of the proposal, the three reales on a load of flour, the hundred thousand loads, the 37,500 pesos expected against 35,429 already spent on lanterns, and the incidence argument in quarters of an ounce of bread — and the service is then measured again seventy years later from the municipal prefect's report: 1,914 lanterns of three designs, the unit cost of each per night, and the gas contract that would have quadrupled the bill. The cost is on the record beside the benefit: the lamps were paid for by a tax on bread, and in 1819 by the levy that had bought maize for the poor in years of scarcity.",
  "confidence": 0.85,
  "last_verified": "2026-08-13",
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    "name": "Lighting Mexico City: the general street lighting of 1790 and how it was paid for",
    "description": "In 1790 the ayuntamiento of Mexico City was ordered to find a permanent revenue for a general street lighting, and proposed three reales on each load of flour entering the capital — about 37,500 pesos a year against 35,429 pesos of lanterns already built. Its argument for the tax was arithmetic: spread over the 430 loaves a load of flour yields, the charge came to a quarter of an ounce of bread. By 1864 the city burned 1,914 lanterns of three competing designs.",
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    "dateModified": "2026-08-13",
    "citation": [
      {
        "@type": "CreativeWork",
        "name": "Memoria económica de la municipalidad de México, formada de órden del Exmo. Ayuntamiento",
        "url": "https://books.google.com/books?id=dLljAAAAcAAJ&pg=PA15"
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      {
        "@type": "CreativeWork",
        "name": "Memoria de los principales ramos de la policía urbana y de los fondos de la Ciudad de México presentada á la Serenísima Regencia del Imperio",
        "url": "https://books.google.com/books?id=cAhEAAAAYAAJ&pg=PA49"
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    "@type": "Article",
    "headline": "Lighting Mexico City: the general street lighting of 1790 and how it was paid for"
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