Hogrän Church consists of a Romanesque tower and a Gothic nave and choir. The tower thus is the oldest part of the church, dating from circa 1200. Attached to it was originally an earlier stone church, also Romanesque in style and erected during the 12th century. During the 14th century, it was however replaced by the presently visible Gothic nave and choir. A few details from this earlier church, such as a few sculpted reliefs and a Romanesque window-frame, have been incorporated in the Gothic church.
The interior of the church is characterised by the broad width of the nave (10 metres). The church contains a number of medieval items. The triumphal cross is one of the oldest wooden sculptures from Gotland, dating from the 12th century. The finely carved doors of the tabernacle are from the early 15th century, and the door of the sacristy is likewise medieval. The baptismal font, probably a work by the craftsman or workshop known as Master Byzantios, is from the late 12th century. Of later date are the altarpiece (1634), the pulpit (1637) and the choir stalls (17th century but with incorporated medieval elements).
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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.