Year 817 (DCCCXVII) was a common year starting on Thursday of the Julian calendar. Summer – Emperor Louis I issues an Ordinatio Imperii, an imperial decree that lays out plans for an orderly succession.

拜占廷 皇帝 利奥五世 在迈塞姆布里亚战役（米山布里亚战役）击败 保加利亚，迫其签下30年和约。 法蘭克 國王 虔誠者路易 頒布詔命，規定帝國繼承人制度，以其子 洛泰爾一世 為副帝，其餘諸子分封為王，並規定繼承順序，但隨後將較偏愛的 禿頭查理 之繼承順位提前。 1月25日 —— 巴斯加一世 任第99任羅馬 教宗。 吳元濟， 淮西節度使， 唐朝 後期 藩鎮 首領。

What happened and who was notable in 817 AD? Browse important events, world leaders, notable birthdays, and tragic deaths from the year 817 AD.

2021年12月3日 · Digital Abbey Library of medieval codices at St. Gallen, Switzerland. The library’s valuable holdings illustrate the development of European culture and document the cultural achievements of the Monastery of St. Gall from the 7th century until the dissolution of the Abbey in the year 1805. (8th–15th centuries; facsimiles)

817年，农历丁酉年（鸡年）。 中国纪年，唐宪宗昭文章武大圣至神孝皇帝元和十二年。 元和十二年（八一七）正月，李愬代 袁滋 就任唐随邓（今河南泌阳） 节度使。 时军中屡为 淮西 （今河南汝南）兵所败，士气不振，不愿再战。 李愬欲乘虚袭击淮西，先示以柔弱，使淮西兵懈怠。 遂亲巡军营，安抚伤病将士，不言攻战进取。 淮西将自以屡败官军，认为李愬名位低微，军政不肃，遂不为备。 元和十二年（八一七）正月，宪宗以 淮西 （今河南汝南）、 成德 （今河北正定） …

While we in the name of God, in the year 817 of the incarnation of the Lord, in the tenth indiction, and in the fourth year of our reign, in the month of July, had assembled in our palace at Aix in our accustomed manner a sacred synod and the generality of our people to treat of ecclesiastical needs and the needs of our whole empire, and were ...

2017年1月7日 · What happened in the year 817 in history? Famous historical events that shook and changed the world. Discover events in 817.

Unordered events occurring during the year of 817AD. This information was collected as part of a lifelong project to create a historical timeline by E. McNally. The rest of the timeline can be found here: https://archive.org/details/emcnallychronology

2024年10月12日 · Year 817 (DCCCXVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. Summer Emperor Louis I issues an Ordinatio Imperii, an imperial decree that lays out plans for an ordely succession. He divides the Frankish Empire among his three sons Lothair

In the year 817, the world was in a state of flux, with events unfolding across Europe and North Africa that would have long-lasting impacts on the people of those regions. In Europe, the year was dominated by the actions of the powerful Frankish Emperor Louis I, who issued a decree known as the 'Ordinatio Imperii', which set out his plans for ...