It is clear that the structural material is masonry, but the type of reinforcement is unknown. The reinforcing may be hidden, or information about it is unavailable.

M99_Portugal_Brzev_1

These buildings in Lisbon, Portugal are likely of masonry construction, but it is not known whether reinforcement was provided (note exterior walls covered by glazed ceramic tiles typical of Portugal) (S. Brzev)

M99_Poland_Scawthorn_1

These buildings in Vroclaw, Poland are likely of masonry construction, but it is not known whether reinforcement was provided (C. Scawthorn)