The St. Joseph Observatory (OSJ) is an amateur astronomy observatory located in Buenos Aires, Argentina. It was founded in 1913, but was initially constructed in 1870. It is the oldest astronomical observatory in Buenos Aires which still remains in activity. The institution currently performs research and recreational activities for the public as courses or seminars. St. Joseph Observatory (OSJ) has several sections for education, outreach, and astronomical observation. For its unique location in the central tower of the St. Joseph school, its structure is vertical type, where a section succeeds another in the subsequent floor, accessed by a centennial all wooden staircase tower type. More information...

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