שו''ת תשובה מאהבה - פורים בפראג 1808
Rabbi Elazar Falkels. Prague 1754-1826
"...Here is the glorious city of Prague. My fathers and grandfathers and their fathers and my ancestors
Read the Megillah also on T"u and send food and gifts to the needy and there is nothing between 14 and Tu
But only the blessing of the Megila. And they say that there is a question whether our city Prague - is to be considered as "surrounded by a wall from the days of Joshua son of Nun"
And this is how I observed it and have been following them since the day I stood my ground
But most of the people of the city and among them, great Torah followers -- are not reading the Megila but on the fourteenth