"black nobility" meaning in English

{
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    {
      "args": {
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        "2": "it",
        "3": "nobiltà nera"
      },
      "expansion": "Calque of Italian nobiltà nera",
      "name": "calque"
    }
  ],
  "etymology_text": "Calque of Italian nobiltà nera",
  "head_templates": [
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      "args": {
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      "expansion": "black nobility",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "The Roman aristocratic families who sided with the papacy under Pope Pius IX after the Savoy family-led army of the Kingdom of Italy entered Rome on 20 September 1870, overthrew the Pope and the Papal States, and took over the Quirinal Palace; and any nobles subsequently ennobled by the Pope prior to the 1929 Lateran Treaty."
      ],
      "id": "en-black_nobility-en-noun-9-Ii7hPn",
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          "Roman",
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        [
          "aristocratic",
          "aristocratic"
        ],
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          "families",
          "family"
        ],
        [
          "papacy",
          "papacy"
        ]
      ],
      "synonyms": [
        {
          "word": "black aristocracy"
        }
      ]
    }
  ],
  "word": "black nobility"
}

{
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    {
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        "2": "it",
        "3": "nobiltà nera"
      },
      "expansion": "Calque of Italian nobiltà nera",
      "name": "calque"
    }
  ],
  "etymology_text": "Calque of Italian nobiltà nera",
  "head_templates": [
    {
      "args": {
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      },
      "expansion": "black nobility",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Pages with entries"
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      "glosses": [
        "The Roman aristocratic families who sided with the papacy under Pope Pius IX after the Savoy family-led army of the Kingdom of Italy entered Rome on 20 September 1870, overthrew the Pope and the Papal States, and took over the Quirinal Palace; and any nobles subsequently ennobled by the Pope prior to the 1929 Lateran Treaty."
      ],
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          "aristocratic",
          "aristocratic"
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        ],
        [
          "papacy",
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      "synonyms": [
        {
          "word": "black aristocracy"
        }
      ]
    }
  ],
  "word": "black nobility"
}