| Conventional Long Name: | Republic of Mosina |
| Government Type: | Republic |
| Year Start: | 1848 |
| Date Start: | 3 May |
| Event Start: | Declaration of independence |
| Event1: | Battle of Rogalin |
| Date Event1: | 8 May 1848 |
| Year End: | 1848 |
| Date End: | 9 May |
| Event End: | Capitulation in Bardo |
| Official Languages: | Polish |
| Capital: | Mosina |
| Title Leader: | Head of State |
| Leader1: | Jakub Krotowski-Krauthofer |
| Year Leader1: | 1848 |
| P1: | Kingdom of Prussia |
| Flag P1: | Flag of the Kingdom of Prussia (1803-1892).svg |
| S1: | Kingdom of Prussia |
| Flag S1: | Flag of the Kingdom of Prussia (1803-1892).svg |
| Today: | Poland |
Republic of Mosina (Polish: Rzeczpospolita Mosińska) was a short-lived microstate centred around the city of Mosina, which existed for five or six days in May 1848. The country was proclaimed on 3 May 1848, during the Greater Poland uprising, out of lands of insurrect-controlled lands of Grand Duchy of Posen, Kingdom of Prussia, with Jakub Krotowski-Krauthofer as its head of state. The republic ceased to exist five or six days later, on 8 or 9 May 1848 after the defeat of rebel forces.[1] [2]
The state was meant to be a temporary entity, that later would be reformed into an independent Polish state, that rebels had aimed to recreate. The capital of the country was Mosina and official language was Polish.[1] [2]
In March 1848, during Greater Poland uprising, the insurrectionist forces had formed the National Commity in rebel-controlled city of Mosina, in Grand Duchy of Posen, Kingdom of Prussia, with Wojciech Rost, Antoni Adamski, Stanisław Stefanowicz, Jan Kordylewski and Antoni Ruszkiewicz as its members. On 3 May 1848, the leader of insurgent forces, Jakub Krauthofer-Krotowski had declared the formation of the independent Republic of Mosina in the area around the cities Mosina and Kórnik and made himself a head of state. The state was meant to be a temporary entity, that later would be reformed into an independent Polish state, that rebels had aimed to recreate. Mosina was decided to be the capital of the state.[1] [2] Following the declaration of the country's independence, Krotowski-Krauthofer had replaced Prussian government officials in the area with Polish ones, including appointing Wojciech Rost as the new mayor of Mosina.[2]
The republic ceased to exist five days later, on 8 May 1848, after the rebels defeat in the battle of Rogalin, or a day later, on 9 May, after the clash in Trzebaw and following rebel capitulation in Bardo ending the uprising.[1] [3] Following the capitulation, Krauthofer-Krotowski was imprisoned in Konatrzewo.[3]