Final answer:
True, the original St. Peter's Basilica featured a large transept and an apse, reflecting its status as a martyrium, though the baldachino is a feature of the newer Renaissance-era basilica.
Step-by-step explanation:
The original St. Peter's Basilica, constructed in the 4th century by Emperor Constantine, had a large transept in front of an apse, which is true to the characteristic features of a martyrium. This design was intended to honor the martyrdom of Saint Peter, whom the Catholic Church venerates as its first pope. However, the mention of a baldachino refers to the feature in the new, Renaissance-era St. Peter's Basilica, which was commissioned by the 16th-century pope, Julius II, and involves architects like Bramante, Raphael, and Michelangelo. The new basilica also maintains the location of the main altar over what is believed to be the grave of St. Peter, thereby perpetuating its function as a martyrium.