UNESCO -- " This rock-hewn church is a 600-year-old sanctuary in the building tradition of the northern part of Ethiopia, and marks the advent of Christianity in the southern part of Adadi Mariam, badly damaged by time, has been strengthened and restored with the aid of Switzerland.
Adadi Mariam is a subterranean rock-hewn church similar to those of Lalibela. This church is unique as it is the southern-most church of its type, and stands alone – no other rock-hewn churches are in the area. It has been surmised that King Lalibela ordered the construction of Adida Mariam for his visit to southern Ethiopia. The site dates to the 13th century, but is still an active site of worship. While it dates to around the same time as the Tiya stelae, and is only ~30km north of them, Adadi Mariam provides a strong contrast to the pagan-like aura at Tiya."
No, it is not kept well. But amazing short journey from Addis Ababa, specially since it was winter time, we got tired of the colour green. Wonderful landscape and people. If you are planning on going to Adadi mariam, make sure to visit Tiya stelae which is only 30Km away. You will be surprised how you got so close to a history that dates back when back like this one without a glass window between you and the stelae. Very sad, it's NOT protected at all, I could have picked a piece and brought it home if I wanted too. If you have limited time in addis, I will pass it since there are many other important sites you can go to, but if you have time, it's a place to visit. Love the green country!