## 3 Results and Discussion
### Mortars  
The main mineralogical and petrographic characteristics of analyzed samples are summarized in Tables 3 and 4, respectively. The analyzed mortar samples belong to: attic, S1, S2, S3, and S4; women's gallery, S5, and several masonry of basements, from S6 to S17 (summarized in Table 3). Figure 8: Macroscopic appearance and microphotograph of thin sections of marbles (by polarized optical microscopy; crossed nicols) of external cladding of the Baptistery (**a**,**b**) Cararra; (**c**,**d**) Hymettus; (**e**,**f**) Lasa. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Mortar Samples** & **Depth** & **Binder** & **Aggregate** & **B/A** & **Macporosity** \\ \hline \multirow{8}{*}{S1} & & Natural hydraulic & Composition: quartz & & \\  & & Natural hydraulic & (monocrystalline), feldspar, rock & & \\  & & lime and & fragments (quartzite, sandstone, & \\  & & heterogeneous & calcarenite, micritic limestone) & & \\  & & structure and mi- & and few _cociopesto_ grains & 1/3–1/4 &
\begin{tabular}{c} Medium amount \\ due to pores of \\ irregular shape \\ \end{tabular} \\  & & & critic/microspartic & Homogeneous grain size & & irregular shape \\  & & texture. & distribution & \\  & & Numerous lumps & Grain size: 100 μm–700 μm & & \\  & & & Shape: sub rounded & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Petrographic description of core samples (B/A = binder/aggregate ratio). \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Mortar Samples** & **Position** & **Depth** & **Quartz** & **Calcite** & **Plagioclase** & **K Feldspar** & **Other** \\ \hline S1 & Attic, side 10 & 10–15 cm & +++ & + & + & - & Muscovite (*), chlorite (*) \\ \hline S2 & Attic, side 10 & 9–14 cm & +++ & ++ & + & + & Muscovite (+), chlorite (*) \\ \hline S3 & Attic, side 4–5 & 9–25 cm & +++ & + & + & + & Muscovite (*), chlorite (*) \\  & & 25–30 cm & +++ & + & + & + & Muscovite (*), chlorite (*) \\ \hline S4 & Attic, side 4 & 4–20 cm & +++ & + & + & - & Muscovite (*), chlorite (*), \\  & & 20–35 cm & +++ & ++ & ++ & * & \\  & & & & & & \\  & & & & & & \\ \hline S5 & Women’s & 7–12 cm & +++ & ++ & + & + & Muscovite (*), chlorite (*), \\  & gallery, side 1 & 12–26 cm & +++ & ++ & + & + & Muscovite (*), chlorite (*) \\ \hline S6 & Basements, & 0–10 cm & ++ & +++ & + & - & Muscovite (*) \\  & side 9–10 & 10–32 cm & +++ & ++ & * & - & Muscovite (*) \\ \hline S7 & Basements, & 0–11 cm & +++ & ++ & * & * & Muscovite (*), chlorite (*), \\  & & 11–32 cm & +++ & + & + & - & Muscovite (*), chlorite (*) \\ \hline S8 & Basements, & 0–12 cm & +++ & ++ & ++ & + & Muscovite (+), chlorite (*) \\  & side 8 & 12–38 cm & +++ & + & + & * & Muscovite (*), chlorite (*) \\ \hline S9 & Basements, & 0–11 cm & +++ & + & * & - & Muscovite (*) \\  & side 9 & 11–21 cm & +++ & + & + & + & Muscovite (*), chlorite (*) \\  & & 21–38 cm & +++ & ++ & + & - & Muscovite (*), chlorite (*) \\ \hline S10 & Basements, & 0–15 cm & +++ & ++ & * & - & Muscovite (*) \\  & side 9–10 & 15–38 cm & +++ & ++ & * & * & Muscovite (*) \\ \hline S11 & Basements, & 0–5 cm & +++ & ++ & + & + & Muscovite (*) \\  & side 9 & 0–5 cm & +++ & ++ & + & + & Muscovite (*), valerite (+) \\ \hline S12 & Basements, & 0–4 cm & +++ & ++ & + & - & Muscovite (*), chlorite (*), \\  & central part & 0–5 cm & +++ & + & + & - & Muscovite (*), stricrite (*) \\ \hline S13 & Basements, & 0–4 cm & +++ & ++ & + & * & Muscovite (*), chlorite (*) \\  & central part & 0–2 cm & +++ & ++ & + & * & Muscovite (*), chlorite (*) \\ \hline S15 & Basements, & 0–2 cm & +++ & ++ & + & * & Muscovite (*), chlorite (*) \\  & & & & & & \\ \hline S16 & Basements, & 0–2 cm & +++ & ++ & + & * & Muscovite (*), chlorite (*) \\  & side 7 & 4–12 cm & +++ & + & * & - & Muscovite (*) \\ \hline S17 & Basements, & 0–2 cm & +++ & + & + & + & Muscovite (*), chlorite (*) \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Mineralogical composition (semiquantitative data) of mortars.