Saint James' church was founded for German inhabitants who lived in this part of Brno in the 13th century. There is visible the painted heraldry of mother superior from Oslavany Cistercian monastery with the date 1220 on the vault of the presbytery. This date recalls the consecration of the smaller Romanesque church that once stood here before this late Gothic St. James's church and it used to serve Flemish and German colonists.
In 1368–1405, some chapels were built around the church and these chapels created a unique urbanistic complex. The oldest one was Saint Morris's chapel from the year 1352. Late Gothic construction of the parish church started with building up the choir in 1446. In 1515 the finished presbytery was affected by the fire that caused the roof to fall in and it subsequently destroyed all altars. The new main altar was consecrated in 1516. The building of the churchtower started in the 1520s.
The Baroque interior style was done in 1750-1766. During this rebuilding the older wooden altars were removed and replaced by new marble ones which are still there. In 1871 – 1879 the church was radically reconstructed into the Gothic Revival style led by Heinrich Ferstel.
In 2001, archeological exploration revealed the size of Brno Ossuary, an ossuary underneath the square by the church, which is estimated to contain the remains of 50,000 people.
References:The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.