Rietberg | Princess Margaret, Countess of Snowdon | Sophie, Countess of Wessex | Mary, Princess Royal and Countess of Harewood | Princess Maud, Countess of Southesk | Princess Alice, Countess of Athlone | Margaret Pole, Countess of Salisbury | John II, Count of Rietberg | Frances Hyde, Countess of Clarendon | Countess of Wessex | Edwina Mountbatten, Countess Mountbatten of Burma | Countess Elisabeth Dobržensky de Dobrženicz | Selina Hastings, Countess of Huntingdon | Margaret Howard, Countess of Nottingham | John III of Rietberg | Hedwig of France, Countess of Nevers | Frances Carr, Countess of Somerset | Elizabeth de Burgh, 4th Countess of Ulster | Countess Sophia Albertine of Erbach-Erbach | Countess of Huntingdon's Connexion | Countess Dracula | Beatrice I, Countess of Burgundy | Anne Herbert, Countess of Pembroke | Alice de Lusignan, Countess of Surrey | The Countess Alice | Raine Spencer, Countess Spencer | Mary II, Countess of Menteith | Margot Asquith, Countess of Oxford and Asquith | Margaret Stanley, Countess of Derby | Margaret of Mar, 31st Countess of Mar |
After the death of her husband in 1934, Armgard managed an estate in Reckenwalde, Province of Brandenburg (now Wojnowo, Poland), together with her partner Alexis Pantchoulidzew.
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The SS demanded in September 1944 in Recke, one of Armgard's properties, Schloss Woynowo Walde for military purposes.
Countess Armgard of Rietberg (also: Irmgard; died 13 July 1584) was from 1562 to 1584 Countess of Rietberg in her own right.
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On 27 September 1576, Armgard and Walburgis divided their inheritance: Armgard received Rietberg; Walburgis received the Harlingerland.
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Because she had no brothers, Armgard and her sister Walburgis inherited his possessions.
Armgard (18 December 1883 – 27 April 1971), married in 1905 to Count Bodo of Oeynhausen, divorced in 1908, no issue; Married secondly in 1909 to Prince Bernhard of Lippe-Biesterfeld, had issue.