The western part of the nave and the church tower are the oldest parts of the asymmetrical Vallstena church. They date from the early 13th century. A new chancel arch was built at the middle of the same century, and around circa 1300 the new choir was built. Reconstruction of the nave also started around this time; the original plan seems to have been to replace the entire nave with a new, larger nave but for some reason the work came to a halt. Similar, half-rebuilt churches are relatively common on Gotland. The sacristy was also built at this time. The interior of the church was decorated with church frescos during the 15th century.
The church and its cemetery is surrounded by a low wall, with three lychgates. The oldest of these dates from the 13th century and display some original sculptured details.
The baptismal font is the oldest fitting of the church, dating from the middle of the 13th century. The altarpiece dates from the 14th century and was acquired when the new choir was inaugurated. From the same century dates a crucifix, as well as a richly decorated chest for donations for the poor. From the 14th century are also to tombstones on either side of the altar, carrying inscriptions in both Latin and Old Gutnish; the latter in runes. A few 14th century wooden statues depicting saints originally from Vallstena Church are today housed in Gotland Museum in Visby.
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The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.