It's funny to see Greek claim Alexander the great heritage because Athenians consider Macedonians as Barbarians and no as Greek.
After don't forget that some Thracean territories was conquered by Philipp II and was under their influence.
Macedonian territories were during centuries in their orbit and we can claim that Macedonia (or Fyrom) is the sucessor of Macedonian province and Macedonian province is the successor of Macedonian Kingdom so Macedonia (Fyrom) is the sucessor of Kingdom of Macedonia. yes it's a sophism but it happen frequentlèy in history of Nation.
Many other countries claim to be the successor of former country even if they don't have many link with them.
In fact in begining Greek people encourage this cultural appropriation because it give them claim, they consider themself as Macedonian (so Greek) so it's normal that they are join our country
The Greek state also finances new schools, cultural institutions and opens three consulates in Thessaloniki, Skopje in 1887 and Bitola in 1888, they decided to be against this name after that Macedonians develop their own identites and that Greek fear they will claim Greek Macedonia.
After there is no definite rule for the history or name of a nation, so they can do what they want, they claim to be sucessor of Alexander the Great by sucession of nation.
For me it's a reasonable reason so i accept their claim
But yes they choose this heritage by propaganda and political choice we agree about this.
After for the first question about neo-classical in Romania i think that could happen maybe with a deeper french influence that liberate them, Romania was really pro-french in this time (and still now) so the King could try to use this style to make their country a sort of little France (they could also adopt the style of second empire )
http://diversite.eu/pdf/12_1/DICE_12.1_Full_Text_p51-p60-Florentina-MATACHE.pdf
By exemple Paul GOTTEREAU was a french architect that built a lot official building in neoclassical style in Romania.
So maybe with a great involvement of the kingdom, with a sort of romanian version of Haussemann plan.