The square, naturally in the town centre, is surrounded by historically interesting burgher houses famous for their fine Renaissance and Baroque gables. The sites of the houses were well thought out beforehand, as is obvious from the corresponding numbers of thirteen buildings on both sides of the square. The ground plan for such buildings was typical of the medieval gable house, with a ridged roof which opened on to an arcade in the front of the ground floor. Two houses (nos. 86 and 89) still have their Gothic foundations preserved, however, the other buildings were destroyed during the devastating fire of 1562. These houses were rebuilt in the Renaissance style, however, most of these houses had to be restored again after further fires in 1723 and 1781.
The most prestigious architectural feature in the town is perhaps the old Town Hall. In 1562 the council, having purchased two neighbouring derelict houses, had them rebuilt by Vlach Jakub Cornbell as a new Town Hall. This building was symbolically given the number 'one' during the first official number registration in 1770. The arcade of this new Town Hall opens onto the square by three semicircular arcades on massive columns with three corresponding gables above the only storey of the house. Through a contribution from Ferdinand II, the Town Hall was extended with a massive 31 metre high, four-sided, four-storey tower, which has a gallery, a clock, and an onion-shaped roof with a lantern. The building and its extentions, as well as the church tower, have since become recognised as the symbol and personification of Třeboň. In 1742 the facade of the building was painted with frescoes of the Rožmberk, Swarzenberg, and Třeboň coats-of-arms. In 1819, the Town Hall had a second storey added during further reconstructions.
On the upper side of the square, to the left of the castle gate, there is the so-called Ruthard House, which was the former Town Hall. The ground floor used to house the town brewery. After the reconstruction of the new Town Hall was finished, the Ruthard House was joined to the chateau. The adjoining houses (nos. 106 and 107) now constitute the Zlatá hvězda Hotel. House no. 107 has a newly restored arcade of five bays and there are decorated groined or barrel vaultings both on the front and back wings and in the rooms along the sides. Both houses were crowned with three new Baroque gables.
Among the buildings on the other side of the square, probably the most striking is the Bílý koníček Hotel, which shows one of the first examples of the Renaissance style in Třeboň. The building has been in existence since at least 1544 as indicated by the date carved on one of its columns. The one-storey house has three semi-circular arcades which, until the nineteenth century, formed part of the original archway going around the whole square. The house exhibits a four-storey gable above the crowning cornice, horizontally divided by profiled ledges and vertically by seven cylindrical formations of small bastions. The 'fortress' character of the gable is also accentuated by crenellations which run along the top and by 'key' loopholes.
Another remarkable house, no. 89, is situated in the middle of the northern side of the square. The house, where Štěpánek Netolický originally lived, has well-preserved Gothic features and Renaissance vaulting. Although the house was rebuilt following the fire which swept the town in 1562, in comparison with the other burgher houses it is relatively untouched by the reconstructions. Its vaulted ceilings are delicately painted by a rib-like net. The upper hall, vaulted from a central pillar, is adorned with painted medallions and with mythological motifs in its lunettes. The fact that the house is now used as the great hall of Třeboň does not diminish its beauty and historical value.
The east side of the square is enclosed by the Hradecká gate, the core of which originated between the years 1525 and 1527, when it became part of the fortifications.
The centre of the square has a Renaissance stone fountain, constructed by the mason Jordan in 1569. The ten-sided granite reservoir of the fountain is embelished with some fine circular reliefs of antique heads. In 1609, the council had an ornate Renaissance pillar with gargoyls erected in the middle of the fountain, whose mascarons spout water. The pillar is sealed with an obelisk, on which the letters C H (possibly Hans Colfinger's initials) were engraved.
Next to the fountain is the Baroque Marian statue, constructed by the mason Leopold Huber from České Budějovice. In 1780, the statue of the Virgin Mary was erected at the expense of two local citizens, Jan Pilsa and his wife. It now stands on a thin pyramid, together with the statues of St. Joseph and St. Elizabeth, on a massive three-sided pedestal. Some of the features of the sculptural group represent examples of the 'Classic' style.
Husova street, leading into the square and facing the Town Hall, was used to gain access to the back of the narrow house plots on the square. However, buildings in this street are not as fine as the houses in the square as they have been disfigured by indiscriminate additions, reconstructions, and modifications over the years. Husova street widens along the eastern side of the St. Jiljí church as there used to be a cemetery here. The cemetry was moved from here to the church of St. Alžběta on the periphery of the town in 1844. Opposite the monastery wall, Březanova street leads into Husova street, the former retaining its marvellous historical qualities. House no. 118, a one-storey pharmacy building, possibly offers the most striking impression. This Renaissance house, consisting of three wings and a scraffito ornamented facade, was built for Petr Vok of Rožmberk by Dominik Cometa in the years 1605 and 1606. Constructed on the site of two former burgher houses, it served as a depository for the family archives, library, and picture gallery. The wooden ceilings were carved by the wood carver Dechsner and painted by Tomáš Třebochovský. The Rožmberk archivist and historian, Václav Březan, to whom the granite roll on the building was dedicated in 1903, used to live on the ground floor.
The building of the long corridor, which lies on both sides of the town walls and joins the monastery to the chateau, was also constructed for Petr Vok of Rožmberk by Dominik Cometa between the years 1608 and 1612. This one-storey building, with vaulted rooms on the ground floor, is now used by the public records office of Třeboň for depositing their archives. Following Krčínova street through the East chateau gate, a one-storey building (house no. 49) built between the years 1565 and 1570 has been preserved which retains a cut roof and three-axis facade and an intact early Renessaince disposition with a tavern. On the first floor, there is an open-hearth kitchen. The front and the gate of the main entrance have been rebuilt in the Classical style.
Krčínova street opens into Žižka square, the south of which is enclosed by the Svinenská gate . This gate has bow-shaped gables and scraffito ornamentation on the nothern facade, where there is a small statue of St. Florian amid the first floor windows. The ceiling of the carriageway is also covered by scraffito envelope ornamentation. When leaving Třeboň by the Svinenská gate, the , thoroughfare crosses yet another gate within the outer belt of the towns fortification, the Novohradská gate which is datable to the first half of the 16th century. The gate still retains the original shape of its Gothic arches. The entrance to the gate is defended by castle walls. On the western outskirts of the historical centre, the town is approached by the Budějovická gate, which was built to the design of Dominik Cometa and Jan Lukan during the years 1605 and 1611 as a substitution for the walled up Břilická gate next to the chateau. It was reconstructed in 1819 and soon after the portico of the outer side of the gate was pulled down.
South of the town centre are the premises of the Třeboň brewery. These consist of a number of beautiful buildings, the majority of which date back to the last half of the nineteenth century. The facade faces the east side of Žižka square. It was somewhere in this area that Petr Vok of Rožmberk had an arsenal built between 1606 - 1608. From 1699 to 1723, the arsenal was reconstructed into a lordly brewery according to the design of the Schwarzenberg's builder, Jakub de Maggi, and under the supervision of his son Jakub. Later, Pavel Ignác Bayer, the new Swarzenberg master builder, also helped. As time went on it became difficult for the brewery to keep up with the demand for its product and so the owners extended the property until it developed into its present form. 'Regent' beer is produced only according to traditional methods and uses only natural ingredients. On the same side of the historical core of the town, part of the town's bulwarks, as well as some of the supporting bastions, have been preserved to the present day. These can be seen to best advantage when standing on the dike of the Svět pond.